Duffy 2 is an Anglicized form of the Irish surname Mac Dhuibhshíthe, which means "son of Duibhshíth". The given name Duibhshíth is composed of the Gaelic elements dubh meaning "black" and síth meaning "peace", so the name translates to "black peace". The surname originated in Ireland and later spread to Scotland, where it was also adopted in Gaelic communities. In Scotland, the name took various Anglicized forms, including McAfee, McFee, and McPhee, all of which derive from the same Gaelic root Mac Dhuibhshíthe. The Scottish Gaelic form MacDhubhshìth preserves the original spelling more closely. The name is found predominantly in Ireland and Scotland, with notable clusters in Ulster and the Scottish Highlands. Its literal meaning of "black peace" may have originally been a warrior's epithet or a reference to a somber, steadfast character. Meaning: "Black peace" (from Gaelic dubh "black" + síth "peace") Origin: Irish Gaelic (Anglicized form of Mac Dhuibhshíthe) Type: Surname Usage Regions: Ireland, Scotland