Antiochus Hierax (in
Greek Aντιoχoς Ιεραξ; killed
226 BC), so called from his grasping and ambitious character, was a separatist ruler of the
Greek Seleucid kingdom, the younger son of
Antiochus II and
Laodice I, Seleucid king of
Syria. On the death of his father in
246 BC Antiochus waged war upon his brother
Seleucus II Callinicus, in order to obtain
Anatolia for himself as an independent kingdom. This war lasted for many years, but Antiochus was at length entirely defeated, chiefly through the efforts of
Attalus, king of
Pergamon, who drove him out of Anatolia. Antiochus subsequently fled to
Egypt where he was killed by robbers in
227 BC. He married a daughter of
Ziaelas, king of
Bithynia.