McDuff
McDuff (also spelled Macduff) is a surname. It is the Anglicized form of the Scottish Gaelic name Mac Dhuibh (Mac = son, Dhuibh = dark/black). Notable people with the surname include:
- Caleb McDuff (born 2008), Welsh deaf racing driver
 - David McDuff (born 1945), Scottish literary translator
 - Dusa McDuff (born 1945), English mathematician
 - Jack McDuff (1926–2001), American jazz musician
 - Kenneth McDuff (1946–1998), American serial killer
 
Fictional characters:
- McDuff, the Talking Dog, a children's television character
 - Suds McDuff, another name for The Simpsons' dog Santa's Little Helper
 - Father Cyril McDuff, a priest in the television series Father Ted