Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
MILLER
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
One who attends a grist-mill. Meillear, Gaelic, having large lips; malair, Gaelic, a merchant; maillor, Gaelic, from maille, armor, and fear, a man--a man in armor, having a coat of mail, a soldier.
Patronymica Britannica (1860)
MILLER. The occupation; which has also given rise to Attmill, Milner, Milne, Mihies, Mills, Milman, Millward. In H.R. Molendinarius, Le Molendinator, De Molendino, &c.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Occupational name
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English