thumb|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.
Stemmata
In italics the Augusti and the Augustae.
Constantius Chlorus
From relationship between Constantius Chlorus and Helena
Constantine I
From marriage between Constantine I and Minervina
Crispus
From marriage between Constantine I and Fausta
Constantina, wife of Hannibalianus and Constantius Gallus
Constantine II
Constantius II
No offspring from marriage between Constantius II and his first wife, daughter of Julius Constantius
No offspring from marriage between Constantius II and Eusebia
From marriage between Constantius II and Faustina
Flavia Maxima Faustina Constantia, wife of Gratian
Constans I
Helena, wife of Julian
From marriage between Constantius Chlorus and Theodora
Flavius Dalmatius
From marriage between Flavius Dalmatius and unknown wife
Flavius Dalmatius
Hannibalianus, husband of Constantina
Julius Constantius
From marriage between Julius Constantius and Galla
son, died in the purges of 337Julian, Epistula ad SPQ Atheniarum 270 D, Roman-emperors.org
daughter, first wife of Constantius II
Constantius Gallus
No offspring from marriage between Gallus and Constantina
From marriage between Julius Constantius and Basilina
Julian
No offspring from marriage between Julian and Helena, daughter of Constantine I
Hannibalianus (must have died before the imperial purges that occurred in 337 because he is not listed among its victims);
Anastasia;
Flavia Julia Constantia, wife of Licinius
Valerius Licinianus Licinius
Eutropia
Nepotianus
{{anchor|tree}}Family tree
Relationship to other tetrarchs
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
Notes
References
R. Scott Moore, "The Stemmata of the Neo-Flavian Emperors", DIR (1998)
R. Scott Moore, "The Stemmata of the Emperors of the Tetrarchy", DIR (1998)
