Galla Placidia
Honorius was born to Emperor Theodosius I and Empress Aelia Flaccilla on September 9, 384 in Constantinople. He was brother to Arcadius and Pulcheria. In 386, his mother died, and in 387, Theodosius married Galla who had taken a temporary refuge in Thessaloniki with her family, including her brother Valentinian II and mother Justina, away from usurper Magnus Maximus. Theodosius and Galla had two children, Galla Placidia and Gratian, making Honorius half-brother to them. Honorius, Arcadius and Galla Placidia were the only children of Theodosius to survive into adulthood.