Where does “Иштван” come from?

Иштван (Serbo-Croatian) comes from Hungarian István, from Ancient Greek Στέφανος, from Ancient Greek στέφω, from Proto-Hellenic stékʷʰō, from Proto-Indo-European stegʷʰ- — to enlace.

Ancestry of “Иштван”, step by step

Step	Language	Word	Meaning
1	Hungarian	István	—
2	Ancient Greek	Στέφανος	In particular: Stephen, an early Christian martyr
3	Ancient Greek	στέφω	I put around; I encircle, crown, wreath, garland
4	Proto-Hellenic	stékʷʰō	to enlace, crown, encircle
5	Proto-Indo-European	stegʷʰ-	to enlace

Every word from Proto-Indo-European stegʷʰ- →Every word from Proto-Hellenic stékʷʰō →Every word from Ancient Greek στέφω →