The Theodosian dynasty was a Roman family that rose to eminence in the waning days of the Roman Empire.

Its founding father was Flavius Theodosius (known to us as Count Theodosius), a great general who had saved Britannia from the Great Conspiracy. His son, Flavius Theodosius was made co-emperor of the Western Roman Empire in 378, and became the last emperor of a unified Roman Empire in 392, until his death in 395. Theodosius I was succeeded by his sons Honorius in the West and Arcadius in the East of the Empire. The House of Theodosius was related with the Valentinian Dynasty 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 in the East was Marcian, the brother in law of Theodosius II. Later on a grand daughter of Valentinian III was married with Olybrius and Anthemius was a son-in-law of Marcian.

See also

Byzantine emperors Families of Rome House of Theodosius Royal families