Constantine III in Roman Biography

Constantine (or Constantinus) III., (Flavius Heraclius,) called No'vus, Emperor of the East, born in 612 A.D., was the son of the emperor Heraclius and Eudoxia. At the death of his father, in 641, he became a partner in the empire with his half-brother Heracleonas. After a reign of three months, he died, or was poisoned by Martina, his step-mother. He left a son, Constans II. See Gibbon, "Decline and Fall of the Roman Empire."