Namesakes
Constantine the Great
(a.k.a. Constantinus) (m) c. 272-337 
Saints
Roman and Byzantine Emperors (Flavius Valerius Aurelius Constantinus) 306-337
Flavius Claudius Constantinus
(a.k.a. Constantinus) (m) 316-340
Roman and Byzantine Emperors 337-340
Heraclius Novus Constantinus
(a.k.a. Constantinus) (m) 612-641
Roman and Byzantine Emperors 641
Constantinus Heraclius
(m) 626-641
Roman and Byzantine Emperors 641
Constantinus
(m) 652-685
Roman and Byzantine Emperors 668-685
Constantine
(a.k.a. Constantinus) (m) 664-715
Bishops of Rome and the Popes 708-715
Constantinus
(m) 718-775
Roman and Byzantine Emperors 741-775
Constantine II
(a.k.a. Constantinus) (m) ?-768
Bishops of Rome and the Popes 767-768
Constantinus
(m) 771-c. 797
Roman and Byzantine Emperors 780-797
Constantinus Porphyrogenitus
(m) 905-959
Roman and Byzantine Emperors 913-959
Constantinus
(m) 960-1028
Roman and Byzantine Emperors 1025-1028
Constantinus Monomachus
(m) c. 1000-1055
Roman and Byzantine Emperors 1042-1055
Constantinus Ducas
(m) 1006-1067
Roman and Byzantine Emperors 1059-1067
Constantinus Palaeologus Dragases
(m) 1404-1453
Roman and Byzantine Emperors 1449-1453