Mithridates or Mithradates () was a Persian noble. His wife was the daughter of Darius III with the sister of Pharnaces, which made him the son-in-law of Darius. Arrian, 1.15.7, 16.3 Diodorus, 17.20.2, 21.3 (wrongly naming him Spithrodates) He was slain by the hand of Alexander the Great himself, at the Battle of the Granicus (modern-day Turkey) in 334 BC, when Alexander plunged his lance through Mithridates' face.
References
Sources Smith, William (editor); Dictionary of Greek and Roman Biography and Mythology, , Boston, (1867)