Where does “Douro” come from?

Douro (Portuguese) comes from Old Portuguese Doiro, from Latin Durius, from Proto-Celtic dubros, from Proto-Indo-European dʰubʰrós, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Ancestry of “Douro”, step by step

StepLanguageWordMeaning
1Old PortugueseDoiro—
2LatinDurius—
3Proto-Celticdubrosdark; water
4Proto-Indo-Europeandʰubʰrósdeep
5Proto-Indo-Europeandʰewbʰ-deep
6Proto-Indo-Europeandʰewh₂-smoke; mist, haze

Words derived from “Douro”

Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Indo-European dʰewbʰ- →Every word from Proto-Indo-European dʰubʰrós →