Where does “Berber” come from?

Berber (German) comes from French berbère, from Arabic بَرْبَر, from Ancient Greek βάρβαρος, from Proto-Indo-European balb-.

Berber (German): Berber person

Definitions

Step	Language	Word	Meaning
1	French	berbère	the Berber language family; Berber
2	Arabic	بَرْبَر	—
3	Ancient Greek	βάρβαρος	non-Greek-speaking, foreign; barbaric, brutal,...
4	Proto-Indo-European	balb-	—