←
Proto-Germanic *brunnô (inherited)
←
Proto-Indo-European *bʰrew- (root)
←
Proto-Indo-European *bʰer- (root)
←
Proto-Indo-European *bʰrun- (inherited)
←
Proto-Indo-European *bʰrew- (mention)
←
Proto-Indo-European *bʰer- (mention)
←
Old Norse bruðr (inherited)