Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
CARROLL
As described in historical dictionaries
Patronymica Britannica (1860)
CARROLL. 1. Possibly from the romantic rock so called in co. Sutherland. 2. A modification of Carolus, Charles.
Surname type: From given name or forename
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic