Ó Maolchathail
Ó MAOLCHATHAIL—I—O Mulcahill, O Molchaill, Mulhall; 'descendant of Maolchathail' (servant of St. Cathal); the name of an old family in Offaly and Leix; still numerous in the latter county and other parts of Leinster.
Alphabetical Index to Irish Surnames