Where does “Dionysius” come from?

Dionysius comes from Latin Dionysius, from Ancient Greek Διονύσιος, formed with the Ancient Greek suffix -ιος from Proto-Indo-European -yós.

Ancestry of “Dionysius”, step by step

StepLanguageWordMeaning
1LatinDionȳsiustyrant of Syracuse
2Ancient GreekΔιονύσιος—
3Ancient Greek-ῐοςbelonging to; of”, “belonging to”, “pertaining to
4Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐος →Every word from Ancient Greek Διονύσιος →
Dionysius — Etymology, Origin & Word History | Etymology Explorer