Where does “İkizce” come from?

İkizce (Turkish) comes from Turkish ikiz, from Ottoman Turkish ایكیز, from Proto-Turkic *ẹk(k)iŕ, from Proto-Turkic ẹk(k)i — two.

Ancestry of “İkizce”, step by step

StepLanguageWordMeaning
1Turkishikiztwin
2Ottoman Turkishایكیزtwin, either of two people who shared the same uterus at the same time
3Proto-Turkic*ẹk(k)iŕtwin
4Proto-Turkicẹk(k)itwo
Every word from Proto-Turkic ẹk(k)i →Every word from Proto-Turkic *ẹk(k)iŕ →Every word from Ottoman Turkish ایكیز →