Nepotianus in Wikipedia
Iulius Nepotianus (died June 30, 350), commonly known in
English as Nepotian, was a member of the Constantinian
dynasty who reigned as 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
Nepotianus was the son of Eutropia, half-sister of Emperor
Constantine I, and of Virius Nepotianus. On his mother's
side, he was the grandson of Emperor Constantius Chlorus and
Flavia Maximiana Theodora.
After the revolt of Magnentius, Nepotianus proclaimed
himself "emperor" and entered Rome with a band of
gladiators on 3 June 350. After attempting to resist
Nepotianus with an undisciplined force of Roman citizens,
the defeated Praefectus urbi Titianus (or Anicius, or
Anicetus), a supporter of Magnentius, fled the city.
Magnentius quickly dealt with this revolt by sending his
trusted magister officiorum Marcellinus to Rome. According
to Eutropius, Nepotianus was killed in the resulting
struggle (on 30 June), his head put on a lance and borne
around the city. In the following days, his mother
Eutropia was also killed, during the persecution of the
supporters of Nepotianus, most of whom were senators.