The name Duncan is a Scottish baby name. In Scottish the meaning of the name Duncan is: From the Irish name Donnchadh, meaning brown warrior. Famous bearer: The Scottish king Duncan I was murdered by Macbeth in 1040.
A dun is an ancient or medieval fort. In the British Isles it is mainly a kind of hillfort and also a kind of Atlantic roundhouse. The term comes from Irish dún or Scottish Gaelic dùn (meaning "fort"), and is cognate with Old Welsh din (whence Welsh dinas "city" comes).
Dune: Baby Name, Meaning &Origin.
