Where does “Heraclius” come from?

Heraclius is the Latin form of Ancient Greek Ἡράκλειος, a name derived from the Greek hero Heracles, though its precise original meaning remains uncertain.

Ancestry of “Heraclius”, step by step

StepLanguageWordMeaning
1LatinHērāclīusThe name of various East Roman emperors, including Heraclius and Heraclonas
2Ancient GreekἡράκλειοςHeraclius, a name borne by an Emperor
3Ancient GreekἩρακλῆςHeracles
4Ancient Greek-κλῆςAn element found in given names
5Ancient Greek-κλέης
6Ancient Greekκλέοςrumour, report; good report, fame, glory; bad...
7Proto-Hellenickléwosfame
8Proto-Indo-Europeanḱléwosfame
9Proto-Indo-Europeanḱlew-to hear
10Proto-Indo-Europeanḱel-to cover; to incline
Every word from Proto-Indo-European ḱel-Every word from Proto-Indo-European ḱlew-Every word from Proto-Indo-European ḱléwos
Heraclius — Etymology, Origin & Word History | Etymology Explorer