Where does “lecchese” come from?

lecchese (Italian) comes from Italian Lecco, from Latin Leucum, from Gaulish leux, from Proto-Celtic leuxs, from Proto-Indo-European léwks — something bright, white.

Ancestry of “lecchese”, step by step

StepLanguageWordMeaning
1ItalianLecco—
2LatinLeucum—
3Gaulishleuxlight
4Proto-Celticleuxs—
5Proto-Indo-Europeanléwkssomething bright, white
Every word from Proto-Indo-European léwks →Every word from Proto-Celtic leuxs →Every word from Gaulish leux →