eparch

Wiktionary EN

From Ancient Greek ἔπαρχος (éparkhos), from ἐπί (epí, “over”) + ἀρχός (arkhós, “ruler”).

1. (historical, Ancient Greece) The governor or prefect of a province.
2. The ruler of an eparchy.
3. (Eastern Orthodoxy) The metropolitan bishop of a province or eparchy.