Raham Mihran was a powerful Iranian military officer from the House of Mihran. He is first mentioned during the Sasanian dynastic struggle of 457-459 between the two brothers Hormizd III and Peroz I. Raham was a supporter of Peroz I, and played a key role in the dynastic struggle, defeating Hormizd's forces and crowning Peroz I as the new Sasanian king.
References
Raham Mihran Wikipedia(Text) CC BY-SA