Heraclius Constantine

Heraclius Constantine (Latin: Heraclius novus Constantinus; Greek: Ἡράκλειος νέος Κωνσταντῖνος, romanized: Hērákleios néos Kōnstantīnos; 3 May 612 – 25 May 641), often enumerated as Constantine III, was one of the shortest reigning sole Byzantine emperors, ruling for three months in 641. He was the eldest son of Emperor Heraclius and his first wife Fabia Eudokia.

Source: Wikipedia — https://en.wikipedia.org/wiki/Heraclius_Constantine