Where does “ซาคา” come from?

ซาคา (Thai) comes from English Sakha, from Russian саха́, from Yakut саха, from Proto-Turkic jaka — collar; edge; edge; collar; collar.

Ancestry of “ซาคา”, step by step

StepLanguageWordMeaning
1EnglishSakhaA person of Sakha ethnicity
2Russianсаха́—
3YakutсахаSakha, Yakuts
4Proto-Turkicjakacollar; edge; edge; collar; collar
Every word from Proto-Turkic jaka →Every word from Yakut саха →Every word from Russian саха́ →