Where does “bantu” come from?

bantu (English) comes from Proto-Bantu bàntʊ̀ — plural of *mʊ̀ntʊ̀; people.

Ancestry of “bantu”, step by step

Step	Language	Word	Meaning
1	Proto-Bantu	bàntʊ̀	plural of *mʊ̀ntʊ̀; people