The first name Dougal is of Celtic, Celtic/Gaelic, English, Scottish, Anglo Saxon, Irish origin. It is often a boy name. It has the following meaning(s):
Celtic: Dark Stranger
Celtic/Gaelic: Dark Stranger
English: Dark-haired Stranger; Anglicized Form of the Gaelic Dubhghall and Dughall, Names Meaning 'Dark-haired Stranger.' Variations: Dugald, Dugal. Pet Names: Dougie
Scottish: Dark-skinned Stranger
Anglo Saxon: Dweller by the Dark Stream
Irish: From the Gaelic Dubhgall, Meaning Dark Stranger. Daugal Was the Nickname the Irish Gave to the Vikings