Constantine II.

There were three joint emperors of Rome appointed in 337 AD. They were Constantine II, Constantius II and Constans I, Constantine I.

Constantinople is a place, now called istanbul. Named after Constantine. Constantine was a Roman Emperor, and was succeeded by his son's Constantine II, Constantius II and Constants. The three of them Ruled Rome until 350 when Magnentius declared himself emperor.

Justinian I, Leo III, John I Tzimisces, Basil II, Manuel I

Constantine II, the eldest son of Constantine the Great. Emperor from 337 to 340. Eusebius claims in Life of Constantine that Constantine the Great confessed Christianity on his death bed, but this is unsupported by any other evidence.