Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
CURWEN
As described in historical dictionaries
Patronymica Britannica (1860)
CURWEN. The Curwens of Workington claim descent from the famous Gospatric, earl of Northumberland. They "took that name by covenant from Culwen, a family of Galloway, the heir whereof the}'