Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
MILLS
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Local) Living near a mill. Gaelic, Milidh, a soldier, the d being silent.
Patronymica Britannica (1860)
MILLS. Perhaps from residence near mills, in some instances. I am rather disposed, however, to consider it the genitive of an abbreA-iatcd form of Michael (see l\Iiles), and the occurrence of Millson seems to favour this derivation. But see Milsou, which is ' local.'
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English