Flavius Iulius Popilius Nepotianus Constantinus (died 30 June 350 AD), 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. and of Virius Nepotianus. On his mother's side, he was the grandson of Emperor Constantius Chlorus and Flavia Maximiana Theodora. Events After the revolt of Magnentius, Nepotianus proclaimed himse… (More on Nepotianus)