After disposing of all relatives who possibly held a claim to the throne, Constantine II, Constantius II and Constans became Roman co-emperors. Constantine II (emperor): Constantine II was Roman emperor from 337 to 340. He was the second son of Emperor Constantine I and the eldest son of his second wife, Flavia Maxima Fausta. He was proclaimed caesar by his father shortly after his birth. He was associated with military victories over the Sarmatians, Alamanni and Goths during his career, for which he was granted a number of victory titles. He held the consulship four times – in 320, 321, 324, and 329. September 9, 337. Wiki link