Duncan is a surname. For the etymology of the surname Duncan this web page cites: Dictionary of American Family Names. Another opinion is that the Gaelic Donnchadh is composed of the elements donn, meaning "brown"; and chadh, meaning "chief" or "noble". In some cases when the surname originates in (Sligo) Ireland it is an Anglicised form of the Gaelic Ó Duinnchinn, meaning "descendant of Donncheann". The Gaelic Donncheann is a byname composed of the elements donn, meaning "brown-haired man" or "chieftain"; and ceann, meaning "head". The surname Duncan is represented in Scottish Gaelic as MacDhonnchaidh.
This page or section lists people with the surnameDuncan. If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link.