Where does “oguz” come from?

oguz (Old Turkic) comes from Turkish oğuz, from Ottoman Turkish اوغوز — Oghuz.

Ancestry of “oguz”, step by step

oguz traces back through two separate lines of ancestry.

via Turkish oğuz

StepLanguageWordMeaning
1Turkishoğuz{{w|Turkic tribal confederations|tribal military...
2Ottoman TurkishاوغوزOghuz

via Proto-Turkic aguŕ

StepLanguageWordMeaning
1Proto-Turkicaguŕcolostrum
Every word from Ottoman Turkish اوغوزEvery word from Turkish oğuz