Where does “laiton” come from?

laiton (Old French) comes from Arabic لَاطُون, from Old Turkic 𐰞𐱃𐰆𐰣, from Proto-Turkic altun — gold.

Ancestry of “laiton”, step by step

StepLanguageWordMeaning
1Arabicلَاطُونcopper, copper alloy; copper; copper alloy
2Old Turkic𐰞𐱃𐰆𐰣gold; golden
3Proto-Turkicaltungold
Every word from Proto-Turkic altun →Every word from Old Turkic 𐰞𐱃𐰆𐰣 →Every word from Arabic لَاطُون →