Isaiah \i-saiah\ as a boy's name is pronounced eye-ZY-ah. It is of Hebrew origin, and the meaning of Isaiah is "salvation of God; the Lord helps me". Biblical: one of the major prophets and writer of the Book of Isaiah. Isais is a Latin form. Basketball player Isiah Thomas.

Isaiah has 8 variant forms: Isa, Isaia, Isais, Isia, Isiah, Issiah, Izaiah and Iziah.

For more information, see also the related name Esias.

Baby names that sound like Isaiah are Asaya, Joziah, Uziah and Uzziah.