When and more importantly why did the change occur from referring to Native Americans by their name in their language (Powhatan, Sacagewa, Tisquantum, etc) to referring to them by English translations (Sitting Bull, Crazy Horse, Red Cloud)?

by avanbay2

Mostly, the title. Going by the time frames those example names came from, I have an idea, but thought I can get more details. Also, sorry if this has been asked and answered, in which case a link will work.

Zugwat

I have a related question: In my parts of the NW (WA & OR) a noticeable amount of the traditional names of American Indian families aren't translated, only Anglicized (ex:Tyayas = Teeias/Teias/etc.) when compared to Plains Indians, why is that?