Ó hAghartaigh
Ó hAGHARTAIGH—I—O Haerty, Hearty, (Hegarty); 'descendant of Faghartach' (same as Fágartach); a variant of Ó Faghartaigh (which see), owing to the aspiration of the initial f. Compare with Ó hOghartaigh.
Alphabetical Index to Irish Surnames