Welsh dôr

← Breton dor (cognate)

← Proto-Brythonic *dor (inherited)

← Proto-Celtic *dwār (inherited)

← Proto-Indo-European *dʰwer- (root)

← Proto-Indo-European *dʰwṓr (inherited)

← Old Welsh dor (inherited)

← Middle Welsh dor (inherited)

→ Breton dor (cognate)

→ Welsh drws (mention)