In his first years he reigned under the regency of his mother Laodice, the eldest sister of the King Mithridates VI of Pontus. During this period the kingdom was seized by King Nicomedes III of Bithynia, who married Laodice.
Nicomedes III was soon expelled by Mithridates VI, who restored upon the throne Ariarathes VII; but when the latter objected to his father's assassin and ally of Mithridates VI, Gordius, the King of Pontus had him killed and put in his place a son of his as Ariarathes IX.
Reverse: Athena holding spear and Nike, shield at her feet; BAΣIΛEΩΣ / APIAPAΘOY / ΦIΛOMHTOPOΣ, M / K / IA
Die Orientation: -
Weight: 3.98 g
Reverse: ΒΑΣΙΛΕΩΣ ΑΝΤΙΟΧΟΥ ΕΥΓΕΡΤΟΥ / ΔΙ-A - Athena standing left, holding Nike and spear and resting left hand on shield at her side, ΔI monogram over A in left field, all within laurel border.
Die Orientation: 12 H
Weight: 16.04 g