Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
LANCASTER
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Local) A town and county of England, the castle or city on the Loyne or Lan river. The Britons called it Caerwerydd. (See Chester.)
Patronymica Britannica (1860)
LANCASTER. The chief town of Lancashire.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
Surname type: Location or geographical feature
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English