Where does “Cumayeri” come from?

Cumayeri (Turkish) comes from Turkish yer, from Ottoman Turkish یر, from Old Anatolian Turkish یر, from Proto-Turkic yẹr — earth.

Ancestry of “Cumayeri”, step by step

Cumayeri traces back through two separate lines of ancestry.

via Turkish yer

StepLanguageWordMeaning
1Turkishyerplace, location; the ground, the earth;...
2Ottoman Turkishیرplace, location
3Old Anatolian Turkishیرsite, land, place, location, a particular point or place in physical space
4Proto-Turkicyẹrearth

via Turkish cuma

StepLanguageWordMeaning
1TurkishcumaFriday
2Ottoman TurkishجمعهFriday
3Classical Persianجُمْعَه—
4Arabicجُمْعَةweek
Every word from Proto-Turkic yẹr →Every word from Old Anatolian Turkish یر →Every word from Ottoman Turkish یر →