Tiridates, grandson of *Phraates (1) IV, was sent by *Tiberius to contest the Parthian throne, with the military support of L. *Vitellius, governor of *Syria (Tac. Ann. 6. 32). Expelling *Artabanus II, he was welcomed by the pro-Roman faction in the cities of Mesopotamia, and was crowned at Ctesiphon (ce 36); he was subsequently driven out again by Artabanus.
