Costin is a surname which derives from the Middle English and Older Scots personal name "Costin", a shortened form of Old French Constantine, Anglo-Norman French Costetin, and the Latin Constantinus.
The name origins lie in Anglo-French roots, from "casteyn", which means "chestnut".
It may also be a variant of Costain, a Manx origin surname.
Notable people with the name include:
It is also a surname and given name in the Romanian language.
Surname:
Given name: