Catholicos.

About Catholicos

A catholicos is the head of certain churches in some Eastern Christian traditions. The title implies autocephaly and, in some cases, it is the title of the head of an autonomous church. The word comes from ancient Greek καθολικός, derived from καθ' ὅλου from κατά and ὅλος, meaning "concerning the whole, universal, general"; it originally designated a financial or civil office in the Roman Empire.