←
Old English feþer (cognate)
←
Proto-Germanic *feþrō (derived)
←
Proto-Indo-European *péth₂r̥ (derived)
←
Proto-Indo-European *peth₂- (mention)
←
German Low German Fedder (cognate)
←
Old Norse fjǫðr (derived)
→
Norwegian Bokmål fjærfe (compound)
→
Norwegian Bokmål fjæring (suffix)