Where does “Ербосын” come from?

Ербосын (Kazakh) comes from Kazakh ер, from Proto-Turkic ēder — saddle.

Ancestry of “Ербосын”, step by step

Ербосын traces back through two separate lines of ancestry.

via Kazakh ер

StepLanguageWordMeaning
1Kazakhерman
2Proto-Turkicēdersaddle

via Kazakh босын

StepLanguageWordMeaning
1Kazakhбосын
Every word from Proto-Turkic ēderEvery word from Kazakh ер