a Galatian, who was ambassador for king Deiotarus at Rome, when Cicero defended that prince in B. C. 45 (Cic. pro Deiot. 15.41, 42). With the devotion of an Oriental, HIieras offered himself to the torture in proof of his master's innocence. (Schol. Gronov. ad Deiot. p. 424; Orelli.) Hieras was at Rome in the following year also, B. C. 44. (Cic. Att. 16. 3.)