Arcadius (January 383 - 1 May 408CE). Flavius Arcadius was the elder son of Theodosius I and Aelia Flaccilla who was made Augustus by his father in 383. Upon the death of Theodosius, the empire was divided between Arcadius, who ruled the Eastern half, and his brother, Honorius, who ruled the Western half. Arcadius was a weak emperor who was constantly under the influence of various court officials and his wife, Aelia Eudoxia, who was the de facto ruler from 400-404. He was succeeded by his son, Theodosius II.