Namesakes
Roman and Byzantine Emperors:
3 emperors
Emperor Flavius Heraclius (a.k.a. Heraclius) 610-641 
Emperor Heraclius Novus Constantinus 641
Emperor Heraclius Constantinus 641-668
Saints:
3 saints
Saint Heraclius ?-263
Saint Heraclius ?-305
Saint Heraclius ?-515