'Ethnarch' definitions:

Definition of 'ethnarch'

(from WordNet)
noun
The ruler of a province (as in the Roman Empire and Byzantine Empire) or certain religious rulers with secular authority; "the election of Makarios III to archbishop gave him the status of the ethnarch of Cyprus"

Definition of 'Ethnarch'

From: GCIDE
  • Ethnarch \Eth"narch\, n. [Gr. ?; ? nation + ? leader, commander. See -arch.] (Gr. Antiq.) The governor of a province or people. --Lew Wallace. [1913 Webster]