Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
POLLOCK
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Local) Derived from the parish of Pollock, in Renfrewshire, Scotland. The name is from the Gaelic Pollag, "a little, pool, pit, or pond," a diminutive of pol, a pool. It is vulgarly pronounced Pock or Polk.
Patronymica Britannica (1860)
POLLOCK. Li Eng. Surnames, i. 169, I \entured to derive this name from Paul, of wliich it seemed to have been a dimiuutive. Its true derivation, however, appears to be from a place called Pollock in Eenfrewshire. The family were ' of that Ilk ' in the twelfth century.
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: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic