ARSACES VI., otherwise MITHRIDATES, a king of the Parthians, spoken of in the First Book of Maccabees. He considerably enlarged the kingdom of Parthia by his good conduct and valour. There were thirty-one kings of the dynasty of the Arsacidae. See Vaillant, Arsacidarum imperium, sive regum Parthorum historia ad fidem numismatum accommodata. Paris, 1725.