←
Proto-Germanic *brunnô (inherited)
←
Proto-Indo-European *bʰrew- (root)
←
Proto-Indo-European *bʰrun- (inherited)
←
Proto-Indo-European *bʰrew- (mention)
←
Proto-Indo-European *bʰer- (mention)
←
Norwegian Bokmål brønn (compound)
←
Norwegian Bokmål -er (mention)
←
Old Norse -ari (derived)
←
Old Norse bruðr (inherited)