Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
LONSDALE
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Local) Derived from the town of Lonsdale, in Westmoreland, England, so named from the river Lon on which it is situated, and dale--the dale on the Lon.
Patronymica Britannica (1860)
LONSDALE. Considerable divisions of Westmoreland and of Lancashire are so called.
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