Duncan (surname)
Duncan is a
Scottish surname. The Scottish Gaelic name ''Donncheann or Donnchadh are''
bynames composed of the elements ''donn'', meaning "brown" or "dark" from
Donn a Gaelic God; and ''chadh'', meaning "chief" or "noble". In some cases when the surname was used in
County Sligo, Ireland, it is an Anglicized form of the Irish Gaelic name
MacDonough or Mac Donnchadha and ''Ó Duinnchinn'', meaning "descendant of ''Donncheann''". The surname Duncan is represented in
Scottish Gaelic as ''MacDhonn.''
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