Duff (surname)

The surname Duff has several origins. In some cases, it is an Anglicised form of the Gaelic "Ó Duibh" ("descendant of "Dubh""), "Mac Giolla Duibh" ("son of the servant of "Dubh""), "Mac Duibh" ("son of "Dubh""). The surname "Duff" is also sometimes a short form of "Duffin" (when of Gaelic origin), and "MacElduff" (from "Mac Giolla Duibh"), and "Duffy" (a name with multiple origins).
The Gaelic "dubh" ("black", "dark") is a word-element which forms a part of many Gaelic names.
Le Duff is the gallicized variant of the Breton surname "An Du" which means The Black.
People.
In the British Royal Family:
Scottish aristocrats: