Chion of Heraclea

Chion was the son of Matris, a noble citizen of Heraclea, city on the coast of Bithynia in Asia Minor, and was a disciple of Plato. Together with Leon, Euxenon, and other young men from noble families, he helped assassinate Clearchus, the tyrant of Heraclea. Most of the conspirators were killed by the tyrant's body guards, others were put to death later, after being tortured. Rule of the city passed to Clearchus' brother, Satyrus, who is generally considered to have been a worse tyrant than Clearchus.