Roman Empire: Theodosian dynasty (Constantinople)
Years: 379 - 457
The Theodosian dynasty is a Roman family that rises to eminence in the waning days of the Roman Empire.Its founder is Flavius Theodosius (often referred to as Count Theodosius), a great general who had saved Britannia from the Great Conspiracy.
His son, Flavius Theodosius is made emperor of the Eastern Roman Empire in 379, and briefly reunites the Roman Empire 394-395 by defeating the usurper Eugenius.
Theodosius I is succeeded by his sons Honorius in the West and Arcadius in the East of the Empire.
The House of Theodosius is related to the Valentinian Dynasty since Theodosius I had married Galla, a daughter of Valentinian I; their daughter is Galla Placidia.
The last emperor in the West belonging to the dynasty is Galla Placidia's son Valentinian III, the last emperor in the East is Marcian, the brother in law of Theodosius II.
Later on, a granddaughter of Valentinian III is married to Olybrius, and Anthemius is a son-in-law of Marcian.
Descendants of the dynasty continue to be part of the East Roman nobility at Constantinople until the end of the sixth century.