A surname of Irish origin; in some dialects, can mean dull or colorless.
From Irish 'Ó Dubhthaigh,' combining 'dubh' (black) and 'thighe' (from a house name), meaning 'descendant of Dubhthach.' Very common in Irish and Scottish families.
The surname Duffy is so common in Ireland that there are thousands of Duffys who probably aren't related at all, but they'd share the same Irish clan origin from centuries ago!
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