Daughter of Theodosius I "the Great", Roman Emperor and Flavia Galla Wife of Ataulf, king of the Visigoths and Constantius III, Roman Emperor Mother of Theodosius; Justa Grata Honoria Augusta and Valentinian III, Western Roman Emperor Sister of Gratianus and Ióannés Half sister of Arcadius Eastern Roman Emperor and Honorius, Western Roman Emperor