Where does “Koyulhisar” come from?

Koyulhisar (Turkish) comes from Turkish hisar, from Ottoman Turkish حصار, from Arabic حِصَار.

Ancestry of “Koyulhisar”, step by step

Koyulhisar traces back through 3 separate lines of ancestry.

via Turkish hisar

StepLanguageWordMeaning
1Turkishhisarfortress, fortification
2Ottoman Turkishحصارcastle, fortress, stronghold
3Arabicحِصَار—

via Proto-Japonic koy

StepLanguageWordMeaning
1Proto-Japonickoyyellow
2Persianقویstrong; Form of قو with ezâfe
3Arabicقَوِيّstrong

via Turkish ul

StepLanguageWordMeaning
1Turkishul—
Every word from Arabic حِصَار →Every word from Ottoman Turkish حصار →Every word from Turkish hisar →