Ariobarzanes (in Greek Aριoβαρζανης) is the first known of the line of rulers of the Greek town of Cius from which were eventually to stem the kings of Pontus in the 3rd century BC. He was betrayed by his son Mithridates to his overlord, the Persian king.¹ It is highly probable he is the same who conducted the Athenian ambassadors, in 405 BC, to his sea-town of Cius in Mysia, after they had been detained three years by order of Cyrus the Younger²; but it's more dubious if he's the same Ariobarzanes who assisted Antalcidas in 388 BC.³

References

• Aristotle, Politics, H. Rackham (translator), Cambridge, MA - London, (1944)
  
• Smith, William (editor); Dictionary of Greek and Roman Biography and Mythology, "Ariobarzanes I", Boston, (1867)
  
• Xenophon, Cyropaedia, Cambridge, MA - London, (1979-83)
  

Notes