Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
COCHRANE
As described in historical dictionaries
Patronymica Britannica (1860)
COCHRANE. COCHRAN. The family were resident in co. Renfrew for many centuries. See Peerage, Earl of Dundouald. The name is probably local, from a place in the district of Paisley.
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic