Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
COCKER
As described in historical dictionaries
Patronymica Britannica (1860)
COCKER. In various En<rlish dialects means a cock-fighter. Halliwell. See however Coker.
Surname type: Occupational name
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English