Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
SHERLOCK
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Gaelic.) From Saor, pronounced as with "h" after the "S," signifying clear, and loch, a lake, the clear lake.
Patronymica Britannica (1860)
SHERLOCK. Having shere, or clear locks? The family were of importance in Ireland from the time of the Tudors. Ortelius's map locates them in the barony of Middlethird, co. Wexford. D' Alton.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
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