An acronym is a word or name formed as an abbreviation from the initial components in a phrase or a word, usually individual letters (as in NATO or laser) and sometimes syllables (as in Benelux). There are no universal standards of the multiple names for such abbreviations and of their orthographic styling.
Son and daughter of your siblings and siblings-in-law. As with uncle and aunt, they're not your nieces and nephews by marriage, they're your nieces and nephews, plain and simple, even if they're your spouse's siblings' kids and don't have a single drop of blood in common with you.
Your mother's first cousin is always your first cousin, once removed. That is at the core of what first cousins and removed cousins are. That relationship will never change; yâ¦our mother's first cousin will always be your first cousin, once removed. The term cousin by marriage is relatively new and undefined, and for many it really does not mean anything.