Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
FARRELL
As described in historical dictionaries
Patronymica Britannica (1860)
FARRELL. The Farrells, now of Dalyston. spring from the O'Ferrals of Mornyng and Bawn, co. Langford, who were of the clan Boy. B.L.G.
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic