Theodosian Dynasty

Roman imperial dynasties
Theodosian dynasty
Chronology
Theodosius I as Emperor of the East		379–392
Theodosius I as sole emperor		392–395
-with Arcadius as junior Augustus of the East		383–395
Honorius as Emperor of the West		395–423
Arcadius as Emperor of the East		395–408
Theodosius II as Emperor of the East		408–450
Marcian as Emperor of the East		450–457
Succession
Preceded by Valentinian dynasty		Followed by Leonid dynasty

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 (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.

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