Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
CULLEN
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(origin: Local) From the town of Cullen, in Banffshire, Scotland. The derivation is uncertain. It may be from Cuillean, holly, a place of holly-trees; or Cullin, the place at the neck of the lake, from Cul, a neck, the back of any thing, and lin, a lake, a pond.
Patronymica Britannica (1860)
CULLEN. 1. Irish. See Cuillean. 2. An old spelling of Cologne.
Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
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