Familial nickname NYT crossword answer is:
SIS (3 letters length)The answer for Familial nickname crossword clue is listed above to help you solve the puzzle you are currently working on.
A familial nickname is a nickname that is given to a family member by another family member. It is usually a term of endearment, and can be used to show affection and closeness between family members. Familial nicknames can be used as a way to differentiate between family members with similar names, or to create a sense of belonging and unity within a family.