Family History and Genealogy Resources by Surname
Lonsdale Surname Origin
(Locality). 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.
Source: An Etymological Dictionary of Family and Christian Names With an Essay on their Derivation and Import; Arthur, William, M.A.; New York, NY: Sheldon, Blake, Bleeker & CO., 1857.
Lonsdale Surname Meaning and Family Facts
There is more to Lonsdale family history than the origin of your surname:
A Lonsdale Family History Thought:
'Those who forget their past are destined to repeat it.' --Robert A. Heinlein