Old English dora

← Old English drān (cognate)

← Middle Dutch dorne (cognate)

← English drone (link)

← English dor (link)

← Proto-Germanic *durô (inherited)

← Middle Low German dorne (cognate)

← Proto-Indo-European *dʰer- (derived)

← Proto-Indo-European *dʰrēn- (mention)

← Dutch dar (cognate)

→ English dor (inherited)

→ French bourdon (cognate)