A nephew is the son of someone's brother or sister. A niece is the daughter of the person's brother or sister. To the nephew or niece, the person is their uncle or aunt. ... In old English, the son of one's sister was called a sister-son.

What does uncle and nephew mean?

While a mom, dad, sister, and brother are members of an immediate family, a nephew is part of your extended family because he's the son of a sibling. When brothers or sisters have male children, you become an aunt or an uncle to a nephew.

What is nephew called?

1 : a son of one's brother, sister, brother-in-law, or sister-in-law. 2 obsolete : a lineal (see lineal sense 3) descendant especially : grandson.