Where does “Есбосын” come from?

Есбосын (Kazakh) comes from Russian ЕС, from Proto-Turkic ēl — realm.

Ancestry of “Есбосын”, step by step

Есбосын traces back through two separate lines of ancestry.

via Russian ЕС

StepLanguageWordMeaning
1RussianЕСEU
2Proto-Turkicēlrealm

via Kazakh босын

StepLanguageWordMeaning
1Kazakhбосын
Every word from Proto-Turkic ēlEvery word from Russian ЕС