Theodosian dynasty

Its founding father was Flavius Theodosius (often referred to as Count Theodosius), a great general who had saved Britannia from the Great Conspiracy. His son, Flavius Theodosius was made emperor of the Eastern Roman Empire in 379, and briefly reunited the Roman Empire 394–395 by defeating the usurper Eugenius. Theodosius I was succeeded by his sons Honorius in the West and Arcadius in the East. The House of Theodosius was related to the Valentinian Dynasty by marriage, since Theodosius I had married Galla, a daughter of Valentinian I. Their daughter was Galla Placidia. The last emperor in the West belonging to the dynasty was Galla Placidia's son Valentinian III. The last emperor of the dynasty in the East was Theodosius II, the son of Arcadius. Later, both in the East and in the West, the dynasty briefly continued, but only through marriages: Marcian became emperor by marrying Pulcheria, the older sister of Theodosius II, after the death of the latter, Petronius Maximus was married to Licinia Eudoxia, the daughter of Theodosius II, and Olybrius was married to Placidia, the daughter of Valentinian III. Anthemius is also sometimes counted to the dynasty as he became a son-in-law of Marcian. Descendants of the dynasty continued to be part of the East Roman nobility at Constantinople until the end of the 6th century.

• Theodosius I (379–395)
• Magnus Maximus (383-388)
• Victor (384-388)
• Arcadius (395–408)
• Honorius (395–423)
• Theodosius II (408–450)
• Valentinian III (425–455)
• Marcian (450–457) through marriage
• Petronius Maximus (455) through marriage
• Olybrius (472) through marriage

In italics the Augusti and the Augustae.

• Sextus Iulius Caesar (Ancestor)
• Marcus Actius
• Iulius Honorius married Flavia Actia / Iulius Theodosius / Iulius Eucherius

• Count Theodosius, married Flavia Thermantia and had issue:
  • Theodosius I, married firstly Aelia Flacilla and secondly Galla:
  • From marriage between Theodosius I and Aelia Flaccilla:
    • Arcadius, married Aelia Eudoxia and had issue:
      • Theodosius II, married saint Eudocia and had issue:
        • Arcadius.
        • Licinia Eudoxia, married firstly Valentinian III (cousin of her father) and secondly Petronius Maximus.
        • Flaccilla.
      • Flaccilla.
      • Pulcheria. Married Marcian.
      • The marriage of Pulcheria and Marcian was childless. However it brought into the dynasty a daughter of Marcian from a previous marriage.
        • Marcia Euphemia. Married Anthemius.
        • From marriage between Marcia Euphemia and Anthemius:
          • Anthemiolus.
          • Marcian. Usurper emperor. Married Leontia, a daughter of Leo I and Verina.
          • Procopius Anthemius.
          • Romulus.
          • Alypia. Married Ricimer.
      • Arcadia.
      • Marina.
    • Honorius. Married first Maria and secondly Thermantia. They were sisters, daughters of Stilicho and Serena. From marriage of Honorius and Maria:
      • Didymus
      • Lagodius
      • Theodiosolus
      • Verenarius
      • Thermantia
      • Serena
    • Pulcheria.
  • From marriage between Theodosius I and Galla, d daughter of Valentinian I and Justina:
    • Gratianus.
    • Johannes.
    • Galla Placidia. Married first Ataulf and secondly Constantius III.
    • From marriage between Galla Placidia and Ataulf:
      • Theodosius.
    • From marriage between Galla Placidia and Constantius III:
      • Justa Grata Honoria. Granted the title Augusta. Proposed marriage to Attila the Hun, treaty never concluded. Married Flavius Bassus Herculanus.
      • Valentinian III, married Licinia Eudoxia (daughter of his cousin) and had issue:
        • Eudocia, married first Paladius, son of Petronius Maximus, and secondly Huneric. From marriage of Eudocia and Huneric king of Vandals:
          • Hilderic king of Vandals in North Africa.
        • Placidia, married Olybrius and had issue:
          • Anicia Juliana, married Areobindus and had issue:
            • Olybrius, married Irene, a niece of Anastasius I and had issue:
              • Proba. Married Anicius Probus Iunior and had issue:
                • Juliana, married Anastasius and had issue:
                  • Areobindus.
                  • Placidia.
                  • Proba.

• Roman Emperor (Late Empire)