Where does “Protagoras” come from?

Protagoras derives from Ancient Greek Πρωταγόρας, from πρωτο- and πρῶτος meaning "first," from πρό meaning "before," ultimately from Proto-Indo-European pro- and per-.

Ancestry of “Protagoras”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Πρωταγόρας	—
2	Ancient Greek	πρωτο-	first, primary
3	Ancient Greek	πρῶτος	first; earliest; foremost, most prominent
4	Ancient Greek	πρό	before; before, in front, forth, forward; before,...
5	Proto-Indo-European	pró	toward, leading to
6	Proto-Indo-European	per-	before, in front; first; to go through
7	Proto-Indo-European	pr̥tós	passed , crossed

Every word from Proto-Indo-European pr̥tós →