8 letters · 16 points in Scrabble
noun the ruler of a province (as in the Roman Empire and Byzantine Empire) or certain religious rulers with secular authority
originFrom Middle French ethnarque, and its sources, New Latin ethnarcha, Koine Greek ἐθνάρχης (ethnárkhēs, “ruler of a tribe or nation, title of a Jewish official”), from Ancient Greek ἔθνος (éthnos, “nation”).
Etymology from Wiktionary, CC BY-SA 3.0