Japheth \j(a)-phe-th\ as a boy's name is pronounced JAY-feth. It is of Hebrew origin, and the meaning of Japheth is "may he expand". Biblical: the oldest of Noah's three sons.

For more information, see also the related name Yaphet.

Baby names that sound like Japheth are Yapheth and Japhet. Other similar baby names are Jareth and Jarreth.