Ó Maolruaidh
Ó MAOLRUAIDH—I—O Melrewe, Mulroe, Mulroy, Mulry, Mulrow, Melroy, Milroy, (Munroe, Monroe); 'descendant of Maolruadh' (red chief); the name of a family of Ui Fiachrach who were originally seated in the parish of Ardagh, in Tirawley, Co. Mayo. It is still common in Mayo and Galway, but sometimes anglicised Monroe.
Alphabetical Index to Irish Surnames