O'Duffy Family Crest
The Irish and Scottish surname O'Duffy is an anglicized form of Gaelic  name Ó Dubhthaigh  meaning “descendant of Dubhthach”, a byname derived from dubh meaning  “black.” Thus the literal meaning would be “son of the black-haired one.”This name was borne by a 6th-century saint who was archbishop of Armagh. A notable bearer of the name was the Irish politician and founder of the Blueshirts political movement Eoin O'Duffy.

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