Ó Ruanaidhín
Ó RUANAIDHÍN—I—O Roynian, O Runynge, Runian, Ruineen, Rooneen, (Rooney); 'descendant of Ruanaidhín' (diminutive of Ruanaidh); a variant of Ó Ruanadha, which see; common in Sligo and other parts of Connacht; also Ó Ruanadháin, Ó Ruanáin, which see.
Alphabetical Index to Irish Surnames