Welsh dŵr

← Breton dour (cognate)

← Proto-Brythonic *duβr (inherited)

← Gaulish uerno-dubrum (cognate)

← Proto-Celtic *dubros (inherited)

← Irish dobhar (cognate)

← Proto-Indo-European *dʰewbʰ- (root)

← Proto-Indo-European *dʰubʰrós (inherited)

← Cornish dowr (cognate)

← Middle Welsh dwfyr (inherited)

→ English dub (cognate)

→ English Thames (cognate)

→ English Stour (cognate)

→ English Dove Holes (cognate)

→ English Glendower (mention)

→ Old English Deorwente (cognate)

→ Welsh dwrgi (compound)

→ Welsh dwrgwn (compound)

→ Welsh madfall ddŵr (compound)

→ Welsh chwerwddwr (compound)

→ Welsh canwraidd y dŵr (compound)

→ German Tauber (mention)

→ Westrobothnian dur (cognate)