Ó Marannáin
Ó MARANNÁIN, Ó MARNÁIN—I—O Marynayne, O Marrinan, O Marnane, Marrinan, Marinane, Marnane, Marnan, Mornan, (Warren); a corruption of Ó Manannáin, which see; also Ó Murnáin, which see. It is anglicised Warren in the neighbourhood of Kenmare.
Alphabetical Index to Irish Surnames