nephew

Definitions:

The son of a brother or sister; fem. niece.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
( orig.) A grandson- so in New Test.; the son of a brother or sister:- fem. NIECE.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
Son of a brother or sister.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (noun) (n.) (noun)
The son of a brother or of a sister.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)

Usage examples:

And she kissed a hand to her nephew
- The Virginians by William Makepeace Thackeray
The moment the big hand of his nephew closed over his leg he launched a stream of curses that chilled the blood and drove his own sons farther back into the shadow of the corner.
- Bull Hunter by Max Brand
His nephew sat alone at the supper table, about which nobody seemed to think.
- The Sign of Flame by E. Werner