indicate the level to which a name has been verified.
Meaning & History
Anglicized form of Gaelic Ó Mongáin ‘descendant of Mongán’, originally a byname for someone with a luxuriant head of hair (from mong ‘hair’, ‘mane’), borne by families from Connacht, County Limerick, and Tyrone. It is also a Huguenot name, traced back to immigrants from Metz; also a possible form of Manning.