Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
FENWICK
As described in historical dictionaries
Patronymica Britannica (1860)
FENWICK. "The Fenwykes of Northumberland, "iusignis et illustris Fenwickorum progenies." are of Saxon origin, and take their cognomen from their ancient fastness in the fenn)' lauds in the vicinity of Stamfordham." Slogans of the North, p. 11 . In ' border ' times they formed a powerful clan, and were the constant allies of the Percies.
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