Hermeias (or Hermias) (lived 4th century BC)

Greek tyrant of Atarneus and Assos in Mysia, northwestern Asia Minor. He succeeded Eubulus and maintained himself as an independent prince in defiance of Persian claims.

Hermeias was a eunuch who became a banker's clerk and purchased mining property in Mysia. In 346 BC, as tyrant, he became a disciple of the philosopher Aristotle, who had established a school in Assos. Aristotle married Pythias, niece and adopted daughter of Hermeias. Hermeias was seized by the Persians, tortured, and crucified 342 BC.