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 Ducas   (m)   1006-1067  
Roman and Byzantine Emperors   1059-1067
Constantinus Monomachus   (m)   ?-1055  
Roman and Byzantine Emperors   1042-1055
Constantinus Palaeologus Dragases   (m)   1404-1453  
Roman and Byzantine Emperors   1449-1453