Where does “dьbrь” come from?
dьbrь (Proto-Slavic) comes from Latin Dubris, from Brythonic Dubras, from Proto-Celtic dubros, from Proto-Indo-European dʰubʰrós, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.
dьbrь (Proto-Slavic): valley, ravine
Ancestry of “dьbrь”, step by step