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.
The child of someone's first cousin is considered to be that person's first cousin once removed. The kids of someone's first cousin's children are that person's first cousins twice removed. This label denotes the fact that the child is the person's first cousin, and the removed aspect specifies which generation the child belongs to. Continue Reading.