Where does “sioux” come from?

sioux (Spanish) comes from English Sioux, from French sioux, from French Nadouessioux, from Ojibwe naadawesiwag — little snakes.

sioux (Spanish): Sioux

Definitions

Step	Language	Word	Meaning
1	English	Sioux	Various formerly nomadic Native American tribes...
2	French	sioux	Sioux; ingenious
3	French	Nadouessioux	—
4	Ojibwe	naadawesiwag	little snakes

sioux — Etymology, Origin & Word History | Etymology Explorer