Arsaces I of Parthia

Arsaces I (/ˈɑːrsəsiːz/; Ancient Greek: Ἀρσάκης; Parthian: 𐭀𐭓𐭔𐭊‎, romanized: Aršak) was the first king of Parthia, ruling from 247 BC to 217 BC, as well as the founder and eponym of the Arsacid dynasty of Parthia. The leader of the Parni, one of the three tribes of the Dahae confederacy, Arsaces founded his dynasty in the mid-3rd century BC when he conquered the satrapy of Parthia (now shared between Turkmenistan and Iran) from Andragoras, who had rebelled against the Seleucid Empire. He spent the rest of his reign consolidating his rule in the region, and successfully stopped the Seleucid efforts to reconquer Parthia. Due to Arsaces' achievements, he became a popular figure amongst the Arsacid monarchs, who used his name as a royal honorific. By the time of his death, Arsaces had laid the foundations of a strong state, which would eventually transform into an empire under his great-grandnephew, Mithridates I, who assumed the ancient Near Eastern royal title of King of Kings. Arsaces was succeeded by his son Arsaces II.

Literary sources are very scarce on Arsaces, and exclusively come from contradictory Greek and Roman accounts written centuries after his death. As a result, his reign is sparsely known. His existence was even questioned by modern scholars, until new studies and archaeological findings confirmed his identity in the 1960s.