Irish: reduced Anglicized form of Gaelic Ó Dubhthaigh
‘descendant of Dubhthach’, a byname derived from dubh
‘black’ (see Duff). This name was borne by a 6th-century saint
who was archbishop of Armagh.Scottish and Irish: reduced
Anglicized form of Gaelic Mac Dhuibhshíthe ‘son of
Duibhshíth’, a personal name composed of the elements
dubh ‘black’ (see Duff) + síth ‘peace’.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
849,385
Historical Documents & Family Trees with Duffy
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The information for this chart came from the U.S. Immigration Collection at Ancestry.co.uk.
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