Quick answer
Manasseh is a boy name with Hebrew roots meaning "causing to forget".
Pronunciation: English /mə.ˈnæs.ə/.
Meaning and history
This name comes from the Hebrew name מְנַשֶּׁה (Menashshe) meaning "causing to forget", a derivative of נָשָׁה (nasha) meaning "to forget". In the Old Testament this is the name of the oldest son of Joseph and Asenath and the ancestor of one of the twelve tribes of Israel. It was also borne by a 7th-century BC king of Judah, condemned in the Bible for allowing the worship of other gods.
Notes and context
Usage: biblical | Ancient Hebrew: מְנַשֶּׁה