Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
CHUBB
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
From the Saxon cob, a great-headed, full-cheeked fellow. The fish called chubb was so named from its having a large head.
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English