I am the third daughter (or son) of my parents.
I am the third child of my parents

How should a question that is answered with the above sentences be framed?

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    @badp not quite up to a bajillion yet, I guess our theory that nobody reads the help text is proven. – Jeff Atwood Oct 19 '12 at 6:26
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    The bounty is a good idea! The problem is that in reality, there is no good answer to this question. Nothing that would be satisfying to suggest. There's just a few dozen different ways the question could be constructed to elicit the desired answer, most of them awkward in one way or another. – Dan Bron Jun 19 '15 at 21:25
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    @Mari-LouA Well, if I were going to suggest something (in addition to "English has a lexical gap, here"), how do you feel about my answer to the previously-canonical question about ordinal inquires? It was downvoted to -1 and is literally the lowest-ranked there (due in part to how late I answered, I'm sure). But it's the best I have to offer. (PS: The 500 points is a very nice gift on your part, but points, positive or negative, don't motivate me, personally.) – Dan Bron Jun 19 '15 at 21:33
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    @Dan Bron's 'English has a lexical gap here' is the best response to a question requiring 'the correct answer'. The usual work-around in conversation is 'Do you have any brothers or sisters?' (usually at a chit-chat rather than want-to-know-intimate-details level). If details are required, 'Are you the eldest?' is usually felt just about acceptable as a follow-up. – Edwin Ashworth Jun 20 '15 at 13:51
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    I don't know how "I'm the third child of my parents" and "I'm the third son (daughter) sound to native English speakers and if it is exactly the same in the meaning to you or not. But if we put both phrases into Japanese, there's obvious difference. "I'm third child-私は3番目の子供です” means I'm (literally) the third in birth order in my family," but "I'm the third son (daughter)-私は3番目の息子〈娘〉です" means I'm the third son (daughter) of three or more than sons (daughters) of our parents, and different from the third child. – Yoichi Oishi Jun 28 '15 at 3:25

17 Answers 17


'Among your sisters, where do you fall with respect to birth order?'

Is that what you're looking for?

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    I am the fourth child of my parents.How to frame a question that gives this answer? – GPEnglish Feb 5 '11 at 19:05
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    'Among your SIBLINGS'... – Chris B. Behrens Feb 5 '11 at 19:21
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    This option seems extraordinarily formal. @nohat’s suggestion seems much more natural! @Chris: surely ‘sisters’ is correct, not ‘siblings’, since the desired answer is ‘third daughter’, not ‘third child’? – PLL Feb 5 '11 at 23:18
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    I think you forgot the you, as in "...where do you fall..." – Jimi Oke Feb 6 '11 at 1:48
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    This question would make me go 'Huh?'. – dwjohnston Jun 23 '15 at 1:39

English doesn't have a standard way of framing a question whose answer is an ordinal number. (Although, which and what can be used but they don't cover all the cases. Some familiar examples are: What grade are you in?, On which floor is your apartment?.

You can try framing the question in several ways but it doesn't guarantee that the answer will include an ordinal number. The context might shape the question also. Some possible questions for the OP are: "What child are you in your family?", "What number child are you in your family?", "Where do you come in your family?", "What is your birth order in your family?". However, you can always get answers like youngest, oldest, middle and such.

"What number" type of question in this context is not that usual and the answer can be a cardinal number also. For example, I am number two. When you start including phrases like where do you fall, birth order, age order etc.; the question gets unnecessarily long and formal, and it wouldn't sound natural in a conversation.

If you really want to get an ordinal number as an answer and sound natural also, I would suggest using the ordinal numbers in the question. For example:

What child are you (in your family)? First, second, third?

Most probably the answer will include the ordinal number, except the answer can be I am the only child.

Or, you might know the number of siblings (let's say three) and you can ask:

Are you the first, second or third child?

On the other hand, there are non-standard interrogative words that you can use in English but they don't sound natural. They are whatth (whath), whichth and how manieth. They include the usual interrogative words plus the suffix -th that forms ordinal numbers.

Whatth (whath) is the only one that is mentioned in a dictionary and it might be somewhat more acceptable than the others. Wiktionary includes a definition and example usages:

(nonstandard) Which ordinal number.

Thanksgiving is on the whatth of November this year?

In many languages, this kind of interrogative word is standard unlike English. Here is a list from omegawiki.org:

enter image description here

Here is an explanation about ordinatives from a credible source (Explorations in Functional Syntax: A New Framework for Lexicogrammatical Analysis by George David Morley):

Ordinatives: Exact ordinatives are known as 'ordinals', e.g.

    The first/second/fourth/fifty eighth shall be last.

They mark the precise numerical position of the entity under consideration in the order/sequence and are more fully known as ordinal numerals. However, they do not always require to take an article. As ordinatives, they answer the question 'Which?' in respect of numerical position, equivalent almost to asking 'the how-many-eth?' or 'the whichth?'.

Ordinatives may also be inexact, including words which mark the relative or non-numerical position of an entity in a series., e.g.

    The next/following/last is the best scene.

Some uses require an article, some don't. They answer the question 'Which?' in respect of relative sequential position but only in the sense of 'the whichth?'.

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    If it were my bounty to award, I would award it to this answer. +1. – Dan Bron Jun 21 '15 at 17:08
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    'whath' is in wiktionary? People will put anything in there. – Mitch Jun 23 '15 at 19:01
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    @Mitch If a word gets used then it belongs in any dictionary that wants to be comprehensive. – curiousdannii Jun 24 '15 at 2:01
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    @curiousdannii sure, but I've just never heard that before. It seems like an intellectual exercise that would never be actually used in practice (or just a joke). Is there any corpus evidence (like COCA or BNC? – Mitch Jun 24 '15 at 3:08
  • +1 for "Are you the first, second or third child?" – henning Jun 24 '15 at 23:36

Navigating the complexities of modern families with English semantics and syntax can generate a bevy of interesting question and answer combinations. An excellent foundation for the queries posted would be the interrogative:

What is your place in the birth order of your family?

Various complexities of the family dynamic would still need to be sorted out with the language of the question and answer. Recognizing the internal ambiguity of the posted question's language, there are several good possibilities for questions to evoke:

  1. The exact answer of the Original Post's primary example:
    I am the third daughter of my parents.
  2. The exact answer of the Current Post's secondary example:
  3. An answer that satisfies the general considerations of the Current Post's alternate example:
    I am the third child of my parents.

  1. By including the word daughter in the example "answer", the original post suggested that boys in the family were not to be counted. If the boys were to be counted with the girls, the "answer" would have disregarded the sex of her siblings as an irrelevant factor, answering simply: "I am the third child of my parents." Accepting this suggestion that the question makes the sex of her older siblings a relevant factor, a question likely to evoke the answer posited in the Original Post becomes:

What is your place in the birth order of girls born to your parents?

As the Original Post example suggests, older boys in the family's birth order are not counted with the girls. Depending on the exact configuration of girls in the immediate family, it would evoke an answer with an ordinal number X:

"I am the X daughter of my parents."

  1. If the target is boys rather than girls, the question would be adapted accordingly:

What is your place in the birth order of boys born to your parents?

Again the question is consistent with the example "answer", suggesting girls in the birth order are not to be counted. Depending on the exact configuration of boys in the immediate family, it would evoke an answer with an ordinal number X:

"I am the X son of my parents."

Both of these first two questions also marginalize the consideration of adopted siblings, which can be a delightful intricacy for a family, even if it is not a common arrangement. (I tend to speak of my adopted sister as if she were born to my parents, unless a significant element of context makes her adoption a significant factor.) Adopted children contend with two orders: first, siblings are ranked on an objective age scale by their birth order. Second, adopted children are ranked on the family's subjective "seniority" scale by their introduction order, depending on the ages of the children at their adoption.

Throw in the complexity of multiple blended families, and the single question could morph into a conversation or even a counseling session. In fact, each of the three example "answers" leave the possibility of a blended family wide open Perhaps she intends to exclude stepbrothers and stepsisters by including the phrase of my parents?

  1. If the expression of my parents simply emphasizes their parenthood, and there is no need to separate boys and girls (or other blended family relationships) the question would be quite simple:

What is your place in the birth order of your family?

In the interrogative contexts above, using the word place in tandem with the word order tends to call for an ordinal number in the response:

3 A position in a sequence or series, typically one ordered on the basis of merit:


The expression place in the birth order is not common by any means, but since the 1982 publication of The Birth Order Book by Dr. Kevin Lehman, and the 1999 publication of Birth Order Blues by Merri Wallace, it is no longer relegated strictly to an obscure corner of psychoanalytic academia. The expression was used by Alexander N. Howe and ‎Christine A. Jackson, in their Marcia Muller and the Female Private Eye: Essays on the Novels That Defined a Subgenre:

... when she considers the issue of placement in birth order. “The middle child, even in the family portrait. A difficult place in the birth order. I'd been the middle child in my adoptive family, and it had made me feel set apart from my older brothers and younger sisters, turned me into something of a loner".
Emphasis added

Also the expression was used in the popular fictional work of Joan Opyr entitled Idaho Code:

Emma nodded sagely, “Middle-child syndrome. Always has to be compensated for her contested place in the birth order..."
Emphasis added

The expression position in the birth order could be considered in lieu of place in the birth order. At one time it was a less obscure expression, but was overtaken by place in the birth order in the early 1990's, as the corpus graph indicates:

enter image description here


Though these three questions suggest an answer with an ordinal number, non-numeric answers like last and middle might be appropriate in particular situations. There is never a guarantee that a question will evoke a particular answer, but the closest thing to a guarantee is to ask for exactly what you want:

  1. Using a number, what is your place in the birth order of girls in your immediate family?

  2. Using a number, what is your place in the birth order of boys in your immediate family?

  3. Using a number, what is your place in the birth order of your immediate family?

  • Place may also refer to your position/duty in life, which can be ambiguous, although reaffirming it with the word order helps to ascertain the meaning. The ambiguity you mention is significant though. If you ask the question as it is originally posed, you risk getting the person's place in their known line of ancestry, especially if they have a proud heritage. The method you suggest to get around that works but it is a bit indirect and cumbersome. I'd probably combine your answer with Manocher's by specifying the exact relationship. "What is your place in the birth order among sisters?" – Tonepoet Jun 22 '15 at 17:14
  • Even though 'place' may have more basis than 'position' currently, I believe that position has more 'area under the curve' in the corpus graph -- it has been used more widely, for a longer period, and at one point with more significance. I believe "which" as an interrogative pronoun requests an ordinal response, so I would strike the 'Using a number' in favor of a condensed version of the question: "Which is your position in the age-sequence of your siblings?" (11 words) – JasonInVegas Jun 23 '15 at 20:27
  • Interesting perspective, @JasonInVegas. Although I would probably not phrase a question that way myself, it does stand a good chance of evoking the alternate answer of the OP. Jump into the fray with an answer :-) – ScotM Jun 23 '15 at 20:31
  • Incidentally I've been writing up an answer along similar lines for several days that I'm just finishing up. I'm mostly focusing on finding a better word than age-sequence.though. You'll see why it took so long when it's posted.... which should be right now actually. – Tonepoet Jun 23 '15 at 21:25
  • I have to say, you are a true wordsmith. I was torn between your answer and ermanen's, but I felt compelled to award the bounty to the highest upvoted answer. – Mari-Lou A Jul 23 '15 at 6:07


Given how important the ordinal birth number would be for birthrights, especially where the concept of primogeniture was involved, I thought that would be a good place to start research. Unfortunately my cursory glance at The Bill of Rights of 1688 and The Act of Succession 1700 did not reveal much and I'm not sure what other traditions factored into how the monarchy was determined. I doubt I'll touch upon the best answer right now or even a good one but I do hope that my efforts are at least informative.

Some Preliminary Information on Ordinal Numbers

The definition of Ordinal for our purposes is "1. A number noting order."

Order is a word that means many, many things so I'd like to highlight the definitions that seem most applicable to our purposes as a Noun:



And as a Verb:


The ordinal number is opposed to the Cardinal number which is interestingly, the definition which gives us more information about ordinal numbers:

"Cardinal numbers, are the numbers, one, two, three, &c., in distinction from first, second, third, &c., which are called ordinal numbers.

It should first be noted that people often are not especially careful with language if they believe their statement is sufficient to get their point across. This happens to be one such context, since numbers are naturally counted in sequence, whether they take cardinal or ordinal form. There is likely no way to phrase the question that guarantees avoidance. Once things have been listed, the first/1st item on that list will often be referred to as "number one", "No. 1" or "#1" instead. See The Free Dictionary by Farlex's definition of Number One for a reference or virtually any top 10 favorites/"best of" list for an real world examples. Picked randomly for convenience, I will use The I.G.N. list titled "Greg Miller's Top 10 Games of All Time" as an example "(Otherwise, Metal Gear Solid would be No. 2.)" Another example of cardinal numbers being used in an ordinal fashion are dates, particularly the years as you an see on any contemporary calender, take the one on Dartford Grammar School's website for an example.

If you want an answer that will guarantee the ordinal form of a number, you may as well stop reading right here. The best we may reasonably hope to do is pick a question where the answer "should" be in ordinal form and treat their cardinal names just the same, when they're used to suggest a special sequence. It is often a pragmatically unimportant distinction.

The Importance of Prioritized Organization

Now we know the form ordinal numbers may take, we may further our goal of making such an answer. The next necessary step is to choose a systematic method of organization to be able to properly use them. The only consistent system of organization chosen for families is from the earliest born to last born because both numbers and the hypothetical potential for prodigy are unlimited. Names do not make sense since those are arbitrarily chosen. The definition of the word Priority is thus very interesting for our purposes:

n. The state of being antecedent in time, or of preceding something else; as priority of birth. The priority of Homer or Hesiod has been a subject of dispute.

  1. Precedence in place or rank.

Priority of debts, is a superior claim to payment, or to payment before others.

There are several a few things to take note of in this definition:

One is the use of the words Place (See also: Position The state of being placed.) and Rank (see: Order as defined above & also Ranked), which in this sense both refer to the process of organization. This allows us to use priority as a method of coming up with ordinal numbers. These are also very good ways to refer to a specific part of the order devised, such as the fifth rank or the ninth place in line.

Another is the sense of the word priority used for debts would be similar to how we use the word prioritize today (Merriam Webster Online), which apparently was not coined until 72 in a U.S. presidential campaign. It most literally means "to make/do/practice priority" according to the online etymology dictionary [see -ize in Webster's Revised Unabridged 1913]". It seems to mean, practice what should be done first or to make an order of importance, such as the sense Webster alluded to in the system of priority debt (also read Priority is an Ordinal Number by Craig Vosper on Value Focused Delivery). I suppose that by virtue of the word's construction, it could also be used to refer to making a system of priority.

I do think the words Priority and Prioritize are both is particularly apt for referring to ordinal numbers, since with an infinite amount there is no "last" number, requiring you to utilize Ordinal numbers in a fashion that is made in priority or rather prioritized. The only time I believe you'll see Ordinal numbers out of a nominal priority sequence is when items on a list are prioritized in reverse, from the least to most important, in order to signify that the item of first importance 'precedes all others in rank, dignity or excellence.'

A Context Sensitive Method of Referring to Order

The last note on the definition of the word Priority is the specific phrase I have emphasized "Priority of Birth." I have not found an independent definition of the entire phrase but the lexical meaning seems clear and what I have found is legal text which may help us learn from context. The term can be found on page 26 of Analytical Digest of Cases Published in the Law Journal Reports, Volume 41, written by Henry D. Barton. in 1888, page 26. It gives us a very interesting usage note in Case v. Drosier, 2 Keen, 764; s.c. 6 Law J. Rep. (s.s.) Chance. 353; and e.c. on app. 5 Myl. & Cr. 246.

"And from and after the decease of his son, said son Henry, to the use of the first, and to the heirs male of body of such first son; and for default of such issue to the use of the second and third, and all in every other the son and sons of his said son Henry according to priority of birth and the heirs male of body and bodies of such sons and sons; and for default such issue to use of the testator's sons and his assigns, during his life impeachment of waste, and from and after the determination of that estate, to the use of trustees preserve contingent remainders during the life of his said son John:"

This context seems to demonstrate a few very helpful things. The first is that "priority of birth" can be described in the ordinal numbers. This method makes a lot of sense, given that a designation of an unspecific "middle" child can not tell a judge how much of a claim he deserves. The second is that since males and sons are specified, it is tacit that the phrase may also be applied to daughters and females, otherwise there should be no need to express gender. The third is of course that the phrase is some significance, at least in legal contexts.

If you've read this far you might be thinking that I want to suggest the use of the phrase "Priority of Birth". However I have a preference against such cumbersome and unusual phrases where it can be avoided. Instead I'm mostly building up to the importance of another word which is Seniority:

  1. Eldership; superior age; priority of birth. He is the elder brother, and entitled to th plae of seniority. [emphasis my own]

The definitions of "superior age" and "priority of birth" are still echoed in The Free Dictionary and to a lesser extent, Merriam Webster Online (birth is omitted). Now we have a way to describe the concept of "priority of birth" in one word concise word, which may be applied to siblings. Unfortunately the word can also refer to prioritization in office. Still, that the word is also mentioned in the definition of primogeniture, which is a word of importance as I mentioned in the preface, makes Seniority seem like an especially apt option.

Describing the Relationship

We also need to know how to ask about the family. Since the answer includes the words brother, sister and sibling, I'm assuming familiarity with those words. Brethren and Sistren (W.R.U 1913) are also more solemn and old fashioned synonyms for the normal plural forms although Sistren is no longer in common use. As an interesting aside, the Online Etymology Dictionary notes that the word Sibling as we understand it today did not exist until 1902. It was reassigned a new meaning from an older, archaic word for the purposes of genealogical studies and does not even appear in the Webster's Revised Unabridged 1913. Alongside other factors, this made it tempting for me to write a null answer, since if the relationship isn't important enough to have its own word, then why should it be ordered? Nevertheless, let's continue, using Sisters as the stand-in since the original question referenced women.

Among/Amongst is one of the simpler prepositions, words denoting a relationship to a word governed. We mean it in the sense that the prude is associated with or making part of the number of whatever follows and possibly there's an association "of the numbers" with it.

Between meaning mutual relations with two or more may also work. Its more commonly interpreted as occupying the intermediate space, although this might help us get an ordinal answer, since this suggests you want an answer that may fit between two spots on the list as all ordinal numbers after the first might, rather than some other type of relationship.

To help keep a clear form, I'll just use one or the other in examples.

Some Possible Questions to Ask

There are many sentences we might choose to construct with the words I've just discussed. I'll spare the details but two strike me as noteworthy:

"What is your seniority amongst sisters?"

It sounds nice and concise but is possibly a little too ambiguous. I could see eldest/oldest. That isn't a problem, since it is synonymous with first in this system of ordering. Maybe "last" or "none" is problematic, although its' arguably not a valid answer. A straight age would not help determine this answer. Middle or middling might be used in a relative sense but these aren't isn't in itself a full answer to the question, unless it's in the middle of three, where only one possible position may be considered the entirety of the middle.

"Which is your precise position in the order of seniority between sisters?

This sentence sounds a little too verbose but it is the hardest to misinterpret that I can think of without resorting to weird words. I'm hoping that the use of the words which and precise will affirm that I'm looking for an exact value, rather than a relative answer. Position aside from being used to designate the rank, is also being used, since you've already been born and hence, placed so the word refers to a fixed sequence of birth. This way we should get the number you were actually born in, rather than your place in the remainder of survivors.

Additional Thoughts

I considered devising an answer using the word "ordinal" to try and make it completely unambiguous but it is implied that part of the reason you're asking is because you do not want to use such an unusual word. I think it'd actually be more ambiguous in conjunction with the word seniority too, since I believe you'd have people thinking about official positions in a nunnery. I think the unsuitability of the word ordinal itself is part of what makes the question so difficult.

A Generalized Citation: The American Dictionary of the English Language by Noah Webster in 1828, is the main reference for linked definitions in this article, except where otherwise stated.


“How many older sisters do you have?”

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    This question asks for a cardinal number rather than an ordinal number and it will be one less than the number in the OP "answer"? – Morgan Horse Jun 20 '15 at 21:36
  • To be gender-neutral, "How many older siblings do you have?" – JasonInVegas Jun 23 '15 at 20:11

Where do you fall in birth order among your siblings?

  • Since the answer references sisters (or brothers), the word siblings is too general. – ScotM Jun 19 '15 at 23:01
  • @ScotM the OP also asked about "child". See my edit, please. – Mari-Lou A Jun 20 '15 at 11:09
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    The question is now ambiguous enough to accommodate this answer , @Mari-LouA :-), but the two separate questions would require unique framings. One question requires counting children of one sex, the other is about siblings in general. You are vested in this while I am not, so I have no complaint. – ScotM Jun 20 '15 at 14:53
  • @ScotM I dont think the question requires a superhuman effort just because the word child is added. The principle is the same. The question is asking about a person's birth order. – Mari-Lou A Jun 20 '15 at 17:15
  • Agreed, @Mari-LouA, the human mind is quite comfortable with ambiguity. – ScotM Jun 20 '15 at 19:00

I've done some research:

What cardinal number child are you ?                sounds off-putting

This question is perfectly fine, but sounds unpleasant in a conversation.

What number child are you ?                      acceptable

Although informal, you can expect an answer with this question.

Chronologically speaking, which child are you ?      better workaround

As long as we're confined to Five Ws, this is the best workaround.

Most of the languages have a workaround for ordinal number questions. The -ième (th) suffix is used in French after the question word. For example, combien (how much) + -ième (th) = combientième. Introducing an interrogative suffix -th or -eth would streamline the usage of such words.



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    These questions does not give the exact answer. The OP requires a question which should arrive exactly at the answer "I am the third child". Yours is simply asks for a Yes/No and further requires a qualifier – gelolopez Jun 20 '15 at 15:44
  • Shouldn't it should be whicheth? Isn't whichth too hard to pronounce, even for a language that includes words like sixths. – Peter Shor Jun 20 '15 at 17:08
  • It would be confused with the archaic -eth suffix as in cometh and goeth. Or it could be used for multiples of 10 say twentieth, thirtieth and so on. – Jimmy Jun 20 '15 at 17:40
  • @Jimmy Well, that last one is the same suffix as -th in sixth, etc., so there’d be no ‘confusion’ between them. Whicheth seems more palatable to me, too, than whichth, not least because ⟨chth⟩ is always, whenever it appears in existing English words, pronounced [kθ], never [tʃθ] (a nonexistent cluster). Whichth looks to me like it’s supposed to be pronounced [wɪkθ] or [ʍɪkθ]. – Janus Bahs Jacquet Jun 20 '15 at 18:28

"Where [does] [subject] [come|fall] in [order] ?"

This is an attempt at a generic answer to the question of framing questions for which an ordinal answer is required.

  • [subject] is the specific subject of the question. It could be 'you', or a name, or something else that identifies who or what you want the ordinal number of.
  • Use the form of 'do', 'does' or 'did' that is appropriate to your subject and situation. (e.g. 'Where do you' or 'Where did George III' or 'where does the letter C'...)
  • [order] is the ordinal list in which you are requesting the position of [subject]. Sometimes the order is implied; see the horse race example at the end for an example.
  • use of the word come or fall is partly a stylistic choice, but may also be required to be one or the other for certain subjects. Come is perhaps less formal, but fall will also not be appropriate in all cases.

To apply it to the specific case in the original question, for example:

  • [subject] in this case is you.
  • The appropriate form of do/does/did for 'you' is do.
  • [order] is the birth order of sons in your family (or the birth order of *daughters* in your family in the modified question, or the birth order of your family if gender is unimportant)
  • I choose fall over come in this case.


Where do you fall in the birth order of sons in your family?

Where do you fall in the birth order of daughters in your family?

Where do you fall in the birth order of your family?

To apply this formulation in an entirely different case:

Where does the letter C come in alphabetical order?

Answer: "C is the third letter in alphabetical order."

Sometimes, the actual order is implied by the situation:

Where did your horse come in the race? (Implied: the order is the finishing order of the race.)

or even:

Where did your horse come?

Note also that using fall instead of come would not be appropriate for a race, since it would imply that the subject fell over rather than finishing the race.


"Are your siblings older or younger than you?", or perhaps "Are you the oldest?" or "Are you the youngest?"

The term birth order would only be used in a scientific context. Even siblings is relatively formal, you'd more often hear "brothers and sisters".

  • 1
    Yes. this seems like the natural way to extract the information you want. Of course, you could also ask: Are you the second daughter of your parents?- No, I'm the third or Is Obama the 33rd American president? - No, he's the 44th, etc.. – Shoe Jun 20 '15 at 8:25
  • This would work on witness questioning – gelolopez Jun 20 '15 at 15:39
  • 'How many older and younger brothers and sisters do you have?' – Edwin Ashworth Jun 24 '15 at 13:59

It may be somewhat informal, but I would ask

What number child are you?

What number daughter are you?

Answered with:

I'm number two.

I'm the second daughter.

This might not be appropriate on some formal documentation for example, but in everyday conversational English I think it has the most immediate meaning to the subject, over some of the answers like:

What is your place in the birth order of your family?

Which would have them pause to think.

  • Q:What number child are you? A: I am not a child, and when I was a child I did not know my birth parents. – JasonInVegas Jun 23 '15 at 20:13
  • Q: What number daughter are you? A: in my birth family I was the only daughter. -- doesn't tell ordinal position, nor total, if one were interested. – JasonInVegas Jun 23 '15 at 20:15
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    An adult can be a child. There's evening the term 'Adult child'. Re: presumably you're talking about adoption, that's an entirely different discussion and affects all answers here. – dwjohnston Jun 23 '15 at 21:19

Your response:

I am the third daughter (or son) of my parents. OR I am the third child of my parents.

My question:
(Concise and to the point)

"What is your filial order of birth, to your parents?"


As satisfying as it would be if whichth were standard English and you could ask directly, I think you're better off framing it with an example:

I'm the nth child in my family. Which are you?

The accepted answer is good for formal situations, but I think this is better for everyday conversation. It sounds more casual and since it volunteers information as well as asks for it, it fits into the reciprocal pattern conversations often have.


If you aren't the first child/son/daughter of your parents, which are you?

Most people would answer this with an ordinal number.

The answer might be any of these, which use an ordinal number:

  • Third.
  • I am the third (child/son/daughter).
  • But I am the first (child/son/daughter).

An appropriate answer might also be something like

  • I am number three.

But any other question on this matter might receive this same non-conforming answer. Some people just can't cooperate. Given the latitude that English provides, there is always someone who is a naturally discordant communicator.

  • I believe "..., what are you?" sounds better and more natural. You should ask an American speaker what they think. Anyway I'm posting this comment, if people agree or disagree they can chip in. – Mari-Lou A Jul 15 '15 at 6:25
  • @Mari-LouA I have to disagree. The word "which" focuses on the question of ordinality better than "what" does. An answer to the question "what are you" might very reasonably be something like "(I'm not the first, but) I am the brightest!" I am an American speaker. – Canis Lupus Jul 15 '15 at 14:34

What number child are you among your siblings?

  • Thank you for posting your suggestion. But because EL&U needs a canonical post which answers this often asked question, I am looking for answers which contain a bit more detail, with perhaps external references that support them. – Mari-Lou A Jun 20 '15 at 14:01
  • How about if we say : In regard to age;What number child are you among your siblings? – Saeid Jun 20 '15 at 16:53
  • Your suggestion is fine, I didn't mean to imply it wasn't. – Mari-Lou A Jun 20 '15 at 17:20


(Was this Jimmy's answer? I couldn't quite tell.)

  • 2
    I see where you're coming from with this answer, but I think it would make more sense to casual passers-by if you explained why whichth would be suitable for the OP's purposes. – Sven Yargs Jun 21 '15 at 5:24
  • It's the third question. One that begins with 'chronologically speaking'. – Jimmy Jun 21 '15 at 7:28
  • @Jimmy, after that sentence in your answer, you hint at what was my reasoning (which is pretty obvious). "Which" is a word, the suffix "-th" when added to a word makes a word, and therefore "whichth" is a word, which has just the right meaning, given the meanings of "which" and "-th". – Greg Lee Jun 21 '15 at 16:30

Any of these questions below should supply the needed information:
(After establishing the fact the person has siblings)

  • How many siblings are there before you?

  • What chronological position are you?

  • What is your ordinal/birth position among your siblings?

  • Regarding the birth order, which position do you hold?


What addition to your family did you become once you were born?

  • 1
    This will not elicit the required response. – Matt E. Эллен Jun 26 '15 at 8:43
  • O.k but how would you answer the question I have asked? – Dunnup Jul 9 '15 at 23:13
  • "What addition? I don't get the question. I mean I guess I'm a son and brother. Also a grandson and cousin and nephew. Is that what you mean?" Is how I would respond. – Matt E. Эллен Jul 10 '15 at 8:45

protected by Kit Z. Fox Jul 9 '15 at 16:33


Would you like to answer one of these unanswered questions instead?
