Where does “Rouen” come from?

Rouen (French) comes from Old French Roem, from Latin Rotomagus, from Gaulish Ratumacos, from Gaulish magos, from Proto-Celtic magos, from Proto-Indo-European meǵh₂- — big, great; great; big, stour, great.

Ancestry of “Rouen”, step by step

StepLanguageWordMeaning
1Old FrenchRoem—
2LatinRotomagusThe chief city of the Veliocasses in Gallia Lugdunensis, now Rouen
3GaulishRatumacos—
4Gaulishmagosfield
5Proto-Celticmagosplain, field
6Proto-Indo-Europeanmeǵh₂-big, great; great; big, stour, great

Words derived from “Rouen”

Every word from Proto-Indo-European meǵh₂- →Every word from Proto-Celtic magos →Every word from Gaulish magos →