"Arsames" is the Hellenized form of the Old Persian name Aršāma[a] ("having a hero’s strength"), which was a common name within the PersianAchaemenid family as well as amongst the Persian elite of the Achaemenid Empire (550–330 BC).[2][3] The name is a compound, composed of aršan ("male, hero") and ama ("strength").[2][b] The name is attested in Aramaic as ʾršm.[2] The feminine form of the name, *Aršāmā (Greek Arsamē), is attested in the daughter of Darius the Great (522–486 BC).[2]
Ziaelas of Bithynia found refuge at the court of king Arsames, and upon the death of king Nicomedes I of Bithynia Ziaelas returned to take the kingdom in 254 BC.
Arsames also supported Antiochus Hierax against his brother, Seleucus II Callinicus, who was defeated at a battle against king Mithridates II of Pontus near Ankara in 239 BC, after which Seleucus lost control of any lands he had across the Taurus mountains. This was to the benefit of Arsames.
Arsames then founded the cities of Arsamosata in Sophene and Arsameia (known today as Eski Kale) in Commagene in 235 BC.
After his death his eldest son Xerxes became king of Commagene, Sophene and Armenia. Orontes IV would succeed Xerxes whilst another son known as "Mithras" (or Mithrenes II) is recorded as being the High Priest of the temple to the Sun and Moon at Armavir.
^Canepa, Matthew P. (2018). "Rival Visions and New Royal Identities in Post-Achaemenid Anatolia and the Caucasus". The Iranian Expanse: Transforming Royal Identity through Architecture, Landscape, and the Built Environment, 550 BCE–642 CE. University of California Press. p. 109. ISBN978-0520379206.