Ó Callanáin
Ó CALLANÁIN—I—O Callanane, O Callinan, Callanane, Callanan, Callinan, Calnan, &c.; 'descendant of Callanán'; the name of a distinguished medical family in South Munster; also of a Galway family who were coarbs of Kilcahill. The latter family is mentioned by MacFirbis.
Alphabetical Index to Irish Surnames