Where does “Бикбулат” come from?

Бикбулат (Bashkir) comes from Bashkir бик, from Proto-Turkic bek — firm, solid, stable.

Ancestry of “Бикбулат”, step by step

Бикбулат traces back through two separate lines of ancestry.

via Bashkir бик

StepLanguageWordMeaning
1Bashkirбикvery
2Proto-Turkicbekfirm, solid, stable

via Persian پولاد

StepLanguageWordMeaning
1Persianپولادsteel
2Middle Persianpwlʾpt'—
Every word from Proto-Turkic bek →Every word from Bashkir бик →