Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
WARLOCK
As described in historical dictionaries
Patronymica Britannica (1860)
WARLOCK. A wizard; one in compact with the Devil. The H.R. shew us a Cambridgeshire tenant bearing the ill-omened name "Nic. AVarloc."