Latin name Flavius Gratianus. 359–383 ad, Roman emperor (367–383): ruled with his father Valentinian I (367–375); ruled the Western Roman Empire with his brother Valentinian II (375-83); appointed Theodosius I emperor of the Eastern Roman Empire (379)
Gratian in American English
(ˈgreɪʃən)
(L. name Flavius Gratianus) a.d. 359-383; Rom. emperor (375-383)