Heraklonas - Augustus of Basileía Rhōmaíōn from April 641 to October 641
Heraklonas was Byzantine emperor for a short time in 641, following the death of his father Heraclius. He ruled jointly with his half-brother, Constantine III.

After Constantine died of tuberculosis in April/May 641, Heraklonas became sole emperor, under the regency of his mother due to his young age, usually dated from April/May – September/October 641, when he was overthrown by Valentinus, a general and usurper of Armenian extract, who installed Constans II, the son of Constantine III.

Valentinus had Heraklonas' nose cut off, then exiled him to Rhodes, where he is believed to have died in the same year.
Heraklonas
Emperor Heraklonas of the Byzantine Empire