Artaxias I
Mirian is known solely from the early medieval Georgian chronicles according to which he was the son of king P'arnajom murdered by his son-in-law, the Armenian Artaxiad prince Artaxias I of Iberia who usurped the crown of Iberia. Mirian was carried to Parthia, there to be brought up at the court. He returned with a Parthian army, killed Arshak's reigning grandson Bartom in battle and became king. He was succeeded by his son, Arshak II.