Where does “Saint-Marcellin-lès-Vaison” come from?

Saint-Marcellin-lès-Vaison (French) comes from French lès, from Middle French les, from Old French les, from Latin illōs, from Latin ille, from Latin olle, from Proto-Italic *olnos — that.

Ancestry of “Saint-Marcellin-lès-Vaison”, step by step

Saint-Marcellin-lès-Vaison traces back through two separate lines of ancestry.

via French lès

StepLanguageWordMeaning
1FrenchlèsAlternative form of lez
2Middle Frenchlesthe
3Old Frenchlesthe
4Latinillōs—
5Latinillethat; those; "; demonstrative pronoun "; that...
6LatinolleArchaic form of ille
7Proto-Italic*olnosthat

via French Vaison

StepLanguageWordMeaning
1FrenchVaisontown in Vaucluse
2OccitanVaison—
3LatinVasioThe chief town of the Vocontii in Gallia Narbonensis, now Vaison-la-Romaine
Every word from Proto-Italic *olnos →Every word from Latin olle →Every word from Latin ille →