Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
MCDOUGALL
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
The son of Dougall, that is, the black stranger, the foreigner, or native of the Lowlands.
Surname type: From name of parent
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic