Where does “Ұлболған” come from?

Ұлболған (Kazakh) comes from Kazakh ұл, from Proto-Turkic ogul — son.

Ancestry of “Ұлболған”, step by step

Ұлболған traces back through two separate lines of ancestry.

via Kazakh ұл

StepLanguageWordMeaning
1Kazakhұлson
2Proto-Turkicogulson

via Kazakh болған

StepLanguageWordMeaning
1Kazakhболған
Every word from Proto-Turkic ogulEvery word from Kazakh ұл