Ó Fiaich
Ó FIAICH—I—O Fee, O Fye, Fye, Foy, Fey, Fay, Hunt; 'descendant of Fiach' (raven); the same as Ó Féich, which see; the name of an ecclesiastical family in Ulster who were erenaghs of Derrybrusk, near Enniskillen; also found in Munster and Connacht.
Alphabetical Index to Irish Surnames