Casperius Aelianus

Casperius Aelianus was an ancient Roman official who served as praetorian prefect under the emperors Domitian and Nerva, and briefly under Nerva's successor Trajan. He is believed to have served as a tribune under the general Vespasian, and to have fought on Vespasian's side during the civil war of AD 69, later known as the Year of the Four Emperors. Vespasian's victory in that war led to his elevation as emperor, and his younger son, Domitian, appointed Casperius as praetorian prefect in the later part of his own reign. Following Domitian's assassination in September of AD 96, Casperius - whom Domitian had removed from his post at some point earlier - was reappointed by the new emperor, Nerva.