Origin of the Name Indio, CA
This is in response to a similar post 6 years ago that shows up on Google searches for Indio, CA
Indio California is located along interstate 10 almost at the midpoint between LA and Phoenix:
https://en.wikipedia.org/wiki/Indio,\_California
According to Wikipedia:
"The City of Indio came about because of the need for a halfway point for the Southern Pacific Railroad between Yuma, Arizona and Los Angeles, since the engines needed to be refilled with water.[10]: 292 Since other areas had the name Indian Wells, Indio (after a Spanish variation of the word "Indian") was chosen instead."
Indio is the Spanish term for Indian, in certain parts of Latin American the word "Indio" carries negative connotations since it was and is used as an insult for people who look like they have native American admixture. The proper term for native peoples in Spanish is indigeno or indigena.
Southern Pacific railroad was probably unaware of the negative connotations of the word and chose it simply to differentiate their town from other towns named Indian wells, with no negative intentions.