塞琉古二世
Originally a vassal of the Greek Seleucid Empire, Ariaramnes rebelled and obtained independence. However, he sustained friendly relations with his former suzerains, with one of his daughters marrying prince Antiochus Hierax, and the latters sister Stratonice marrying Ariaramnes' son Ariarathes. Consequently, the Seleucid king Antiochus II Theos () bestowed Ariarathes with the title of "king", who ruled together with Ariaramnes from 255 BC. In 230 BC, Ariaramnes received Antiochus Hierax after the latter had fled from his ruling brother Seleucus II Callinicus (). Ariaramnes died around the same period, with Ariarathes III becoming the sole ruler of the kingdom.