Where does “ekiz” come from?

ekiz (Old Turkic) comes from Proto-Turkic *ẹk(k)iŕ, from Proto-Turkic ẹk(k)i — two.

Ancestry of “ekiz”, step by step

StepLanguageWordMeaning
1Proto-Turkic*ẹk(k)iŕtwin
2Proto-Turkicẹk(k)itwo
Every word from Proto-Turkic ẹk(k)i →Every word from Proto-Turkic *ẹk(k)iŕ →
ekiz — Etymology, Origin & Word History | Etymology Explorer