origin of name Duffy

Duffy is one of the oldest of Scottish surnames and appears all over the UK. It is an anglicized version of the Gaelic name "Mac Dhubhshith". It combines "mac", meaning "son of"; "dubh", meaning "black"; and "sith", meaning "peace"?thus, "son of the black one of peace". Variant spellings include Duffie, Duffey, O'Duffey, Doohey, O'Dowey, MacDuffie, McFee, McPhee, D'Duffie, O'Duhig, and Duhig. www.archives.com › genealogy › family-history-duffy