Where does “duffel” come from?
duffel (Dutch) comes from Middle Dutch Duffla, from Gaulish dubrum, from Proto-Celtic dubros, from Proto-Indo-European dʰubʰrós, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.
Ancestry of “duffel”, step by step