Ó Maolchluiche
Ó MAOLCHLUICHE—I—O Molklyhy, O Mulclohy, O Mulclahy, O Mulcloy, O Mucklie, Mulclahy, (Mulcahy), Muckley, Stone; 'descendant of Maolchluiche' (gamester); the name of a Sligo family who were chiefs of Cairbre. now the barony of Carbury, in the north of that county, until dispossessed by the O'Dowds in the 14th century. In the 16th century, the name was very scattered, but found chiefly in Donegal, Westmeath, Offaly and Cork. In the census of 1659, it appears as Mulclahy in Co. Limerick. It is now nearly everywhere anglicised Stone owing to an erroneous idea that the latter part of the name is 'cloiche,' gen. of 'cloch,' a stone, while really the gen. of 'cluiche,' a game. In Limerick it has been turned into the more common surname, Mulcahy, while in Co. Cork it has become Muckley. The old form of the name is preserved in Inishmulclohy, also called Coney Island, in Sligo Bay.
Alphabetical Index to Irish Surnames