
Son of Mithridates VI, puppet king.
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Ariarathes IX was installed as king of Cappadocia by his father, Mithridates VI of Pontus, after the murder of the previous king. He served as a puppet ruler, with real power exercised by Pontic officials.
Ariarathes IX was expelled from Cappadocia by a rebellion of the local nobility, who opposed Pontic control. The rebels appealed to Rome for a new king, leading to the appointment of Ariobarzanes I.
Mithridates VI restored Ariarathes IX to the Cappadocian throne after expelling the Roman-appointed king Ariobarzanes I. This act was part of Mithridates' broader campaign to challenge Roman influence in Anatolia.
Ariarathes IX was finally expelled from Cappadocia after the First Mithridatic War ended in Roman victory. He was killed shortly after, ending the Pontic puppet regime in Cappadocia.
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