| Common Name |
Full Name |
Association |
Date Period |
| Diocletian |
Gaius Aurelius Valerius Diocletianus (earlier
Diocles) |
Augustus, Elevated by troops |
284-305 |
| Maximian |
Marcus Aurelius Valerius Maximianus ('Maximian
Herculius') |
Augustus, Elevated by Diocletian |
286-310 |
| Amandus |
Gnaeus Silvius Amandus |
Chieftain of Bagaudae group, Usurper in Gaul |
285-286 |
| Domitius Domitianus |
Lucius Domitius Domitianus |
Usurper in North Africa |
296-297/8 |
| Galerius |
Gaius Galerius Valerius Maximianus (originally
Maximinus, sometimes called Armentarius) |
Augustus, Elevated by Diocletian |
293-311 |
| Galeria Valeria |
Galeria Valeria |
Wife of Galerius |
c.293-311 |
| Constantius I 'Chlorus' |
Flavius Valerius (or Julius) Constantius |
Augustus, Elevated by Diocletian |
293-306 |
| Helena |
Flavia Julia Helena (Saint Helena) |
First wife of Constantius I |
324-328/30 |
| Theodora |
Flavia Maximiana Theodora |
Second wife of Constantius I |
? |
| Severus II |
Flavius Valerius Severus |
Augustus, Elevated by Galerius |
305-307 |
| Maximinus II Daia |
Gaius Galerius Valerius Maximinus (earlier 'Daia') |
Augustus, Elevated by Galerius |
305-313 |
| Maxentius |
Marcus Aurelius Valerius Maxentius |
(Technically) Usurper in Southern Italy,
Elevated by Maximian after coming out of retirement |
306-312 |
| Romulus |
Marcus Valerius (or Marcus Aurelius) Romulus |
Son of Maxentius |
c.294 (or 306)-309 |
| Alexander (of Carthage) |
Lucius Domitius Alexander (Valerius Alexander) |
Usurper in North Africa |
308-310 |
| Licinius I |
Gaius Valerius Licinianus Licinius |
Augustus, Elevated by Diocletian |
308-324 |
| Constantine I |
Flavius Valerius Constantinus |
(Technically) Usurper in York, Elevated by
Constantius I (father) on his deathbed |
306-337 |
| Fausta |
Flavia Maxima Fausta |
Wife of Constantine I |
324-326 |