The Irish surname Dunne, also found in Scotland, is of patronymic origin. The name Dunn is the anglicized form of Gaelic name Ó Duinn, Ó Doinn meaning “descendant of Donn”, a byname meaning “brown-haired”or “chieftain”. In Ireland those who spelt their name Dunn usually came from Ulster, where they were possibly of Scottish extraction. The first recorded spelling of the family name is shown to be that of Gillananaomh O'Duinn, which was dated 1102, in the "Ancient Irish Records", during the reign of Irish High Kings in Opposition, 1103 - 1169.The earliest Scottish reference was and Adam de Dun in 1255.
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