Duffy
PatronymicMeaning
Descendant of Dubhthach, meaning dark or swarthy.
Etymology
Derived from the Irish Ó Dubhthaigh, from the personal name Dubhthach. The surname is associated with County Monaghan and County Cavan in Ulster.
About the Duffy Surname
Duffy is an Ulster surname with roots in the northern counties of Ireland. The name has spread throughout the Irish diaspora and remains common in North America.
Distribution
Primarily found in Ulster, particularly in County Monaghan, County Cavan, and County Donegal.