Flavius Iulius Popilius Nepotianus Constantinus (died 30 June 350 AD) DiMaio, Michael, "Nepotian (350 A.D.)", DIR, commonly Nepotian, was a member of the Constantinian dynasty, and a short-lived usurper of the Roman Empire. He ruled the city of Rome for twenty-eight days, before being killed by his rival usurper Magnentius' general Marcellinus. Background Nepotianus was the son of Eutropia, half-sister of Emperor Constantine I,Eutropius x.11 and of Virius Nepotianus. On his mother's side, he wa… (More on Nepotianus)