Where does “Stephan” come from?

Stephan comes from Ancient Greek στεφανίζω, meaning to crown or wreathe.

Ancestry of “Stephan”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Στέφανος	—
2	Ancient Greek	στέφω	I put around; I encircle, crown, wreath, garland
3	Proto-Hellenic	stékʷʰō	—
4	Proto-Indo-European	stegʷʰ-	to enlace