Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
MILNE
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
A mill. In Gaelic Muileann also signifies a mill; in Welsh, Milain implies firmness, fixedness of purpose.
Patronymica Britannica (1860)
MILNE. MILNES. O. Eng. miln, mcbi, and mulne, a mill. Tlie forms in H.R. are Atte Melne, Atte Mille, De Molendino, and there is also one Alexander de Molendin'Aureo — "Alexander of the Golden Mill." There is a sept or clan of Milne in Koxbnrghshire.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic