Neon, a Messenian, son of Philiades, and brother of Thrasybulus, who is accused by Demosthenes of having betrayed his country to Philip king of Macedon (Dem. de Cor. p. 324, ed. Reiske; Harpocration, s. v. Neon). An elaborate vindication of his conduct, together with that of others of his contemporaries who had adopted the same line of policy, is found in Polybius (xvii. 14).