Where does “Kırkağaç” come from?

Kırkağaç (Turkish) comes from Turkish kırk, from Ottoman Turkish قرق, from Old Anatolian Turkish قرق, from Proto-Turkic kïrk — forty.

Ancestry of “Kırkağaç”, step by step

Kırkağaç traces back through two separate lines of ancestry.

via Turkish kırk

StepLanguageWordMeaning
1Turkishkırkforty
2Ottoman Turkishقرقforty, the cardinal number occurring after thirty-nine and before forty-one
3Old Anatolian Turkishقرقforty
4Proto-Turkickïrkforty

via Turkish ağaç

StepLanguageWordMeaning
1Turkishağaçtree
2Ottoman Turkishağac—
3Proto-Turkicïgačtree
Every word from Proto-Turkic kïrk →Every word from Old Anatolian Turkish قرق →Every word from Ottoman Turkish قرق →