Constantinian dynasty

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
  1. From relationship between Constantius Chlorus and Helena
     • Constantine I
       1. From marriage between Constantine I and Minervina
          • Crispus
       2. From marriage between Constantine I and Fausta
          • Constantina, wife of Hannibalianus and Constantius Gallus
          • Constantine II
          • Constantius II
            1. No offspring from marriage between Constantius II and his first wife, daughter of Julius Constantius
            2. No offspring from marriage between Constantius II and Eusebia
            3. From marriage between Constantius II and Faustina
               • Flavia Maxima Faustina Constantia, wife of Gratian
          • Constans I
          • Helena, wife of Julian
  2. From marriage between Constantius Chlorus and Theodora
     • Flavius Dalmatius
       1. From marriage between Flavius Dalmatius and unknown wife
          • Flavius Dalmatius
          • Hannibalianus, husband of Constantina
     • Julius Constantius
       1. From marriage between Julius Constantius and Galla
          • son, died in the purges of 337
          • daughter, first wife of Constantius II
          • Constantius Gallus
            1. No offspring from marriage between Gallus and Constantina
       2. From marriage between Julius Constantius and Basilina
          • Julian
            1. 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
       1. • Valerius Licinianus Licinius
     • Eutropia
       1. From marriage between Eutropia and Virius Nepotianus
          • Nepotianus

Family tree

Afranius Hannibalianus

Eutropia

Maximianus

Theodora

Constantius Chlorus 250-305-306

Helena of Constantinople 250–330

Constantia 293–330 ∞ Licinius 250-308-324-325

Flavius Dalmatius censor

Julius Constantius d. 337 ∞ 1.Galla 2.Basilina

Anastasia

Eutropia ∞Virius Nepotianus

Fausta 289–326

Constantine I the Great 272-306-337

Minervina

Dalmatius caesar

Hannibalianus

(1) Constantius Gallus

(2) Julian 331-360-363

Helena d. 360

Constantina ∞ 1.Hannibalianus 2.Constantius Gallus

Constantius II 317-337-361 ∞ Faustina

Constantine II 316-337-340

Constans 320-337-350

(daughter) ∞ Justus

Crispus d. 326

Jovian 331-363-364

Marina Severa

Valentinian I Emperor of the West

Justina

Constantia 361–383

Gratian Emperor of the West 359-367-383

Galla

Theodosius I Emperor

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

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)