Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
CHARNOCK
As described in historical dictionaries
Patronymica Britannica (1860)
CHARNOCK. A township and estate in the parish of Standish, co. Lancaster, anciently the possession of the family. The name has been written Chernoke, Charuoke, &c.