Irish bró

← Proto-Celtic *brawū (inherited)

← Proto-Indo-European *gʷreh₂- (root)

← Proto-Indo-European *gʷréh₂wō (inherited)

← Proto-Indo-European *gʷréh₂us (mention)

← Middle Irish bró (inherited)

← Old Irish brao (inherited)

→ Scottish Gaelic brà (cognate)