Manasseh \m(a)-nasseh, man(as)-seh\ as a boy's name is of Hebrew origin, and the meaning of Manasseh is "making forgetfulness". The anglicized version that is popular in Israel. The Civil War of Bull Run was fought near the town of Manassas in Virginia.
Manasseh has 5 variant forms: Manassas, Manases, Manasio, Menashe and Menashi.
Baby names that sound like Manasseh are Manus, Magnus, Magnes, Manzo and Minos.