Antiochus Hierax ("the Hawk") was the younger brother of Seleucus II who was appointed viceroy of Asia Minor during the Third
Syrian War (246-241 BC) between Seleucus II and Ptolemy III. In c. 242 BC Hierax proclaimed himself king and began the War
of the Brothers (c. 241-236 BC) against Seleucus II. Hierax ultimately lost his kingdom and escaped to Thrace, where he was
killed by Galatians in 227 BC.