Axidares was one of the three sons born to King Pacorus II of Parthia[3] by a mother whose name is unknown.
Through his father, he was a member of the House of Parthia thus a relation of the Arsacid dynasty of Armenia.
He was put on the Armenian throne by his paternal uncle, King Osroes I of Parthia without Roman consultation.
Although the Romans supported Axidares' kingship over Armenia, Trajan viewed the action by his uncle as an invitation to war with Parthia.
[7] To avoid to going to war with the Roman emperor Trajan and keep peace with him, Osroes I deposed Axidares from his Armenian throne and replaced him with his other brother Parthamasiris as king.