McClafferty Family CrestThe Irish surname McClafferty is an anglicized form of the Gaelic name Ó Fhlaithbheartaigh or Mac Fhlaithbheartaigh meaning “descendant  of Flaithbheartach,” a personal name composed of the elements flaith meaning “prince, or ruler” and  beartach meaning “doer of good deeds.” The name is manly found in the northern province of Ulster. The Chief of the McClafferty sept was Lord of Aileach (modern Elagh, Co. Donegal), and he is described in the Annals of the Four Masters as the "Tainiste of Tyrone", the term "tainiste" meaning “the heir apparent of a Celtic chieftain, chosen by election during the Chief's lifetime: usually the worthiest of his kin.” The name is first recorded in the New World in New York in 1846. Today there are approximately 700 bearers of the name McClafferty living in the United States.

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