Where does “Rouen” come from?
Rouen (Portuguese) comes from French Rouen, 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