Constantinian dynasty

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Constantine I with his two eldest sons by Fausta, Constantine II and Constantius II
Silver coin of Constans, showing Constans, Constantine II and Constantius II

The Constantinian dynasty is an informal name for the ruling family of the Roman Empire from Constantius Chlorus (died 306) to the death of Julian in 363. It is named after its most famous member, Constantine the Great, who became the sole ruler of the empire in 324. The dynasty is also called Neo-Flavian because every Constantinian emperor bore the name Flavius, similarly to the rulers of the first Flavian dynasty in the 1st century.


In italics the augusti and the augustae.

Family tree[edit]

Family of Constantinian dynasty

Emperors are shown with a rounded-corner border with their dates as Augusti, names with a thicker border appear in both sections

1: Constantine's parents and half-siblings

HelenaFlavia Maximiana Theodora
  • Constantine I
  • 306–337
Flavius DalmatiusHannibalianusFlavia Julia Constantia
GallaJulius ConstantiusBasilinaLicinius IIEutropiaVirius Nepotianus
HannibalianusConstantinaConstantius Gallus

2: Constantine's children

  • Constantine I
  • 306–337
HannibalianusConstantinaConstantius Gallus
Flavia Maxima Constantia

Relationship to other tetrarchs[edit]

Other rulers of the tetrarchy were related to the Constantinian dynasty:

  • Maximian: adoptive father and stepfather-in-law of Constantius Chlorus, father-in-law of Constantine, stepgrandfather-in-law of Licinius
  • Maxentius: adoptive brother and half-brother-in-law of Constantius Chlorus, brother-in-law of Constantine
  • Licinius: son-in-law of Constantius Chlorus, half-brother-in-law of Constantine


  1. ^ Julian, Epistula ad SPQ Atheniarum 270 D,