←
Old Church Slavonic братръ (cognate)
←
West Frisian broer (cognate)
←
Proto-West Germanic *brōþer (inherited)
←
Old High German bruodar (cognate)
←
Ancient Greek φράτηρ (cognate)
←
Low German Broor (cognate)
←
Tocharian B procer (cognate)
←
Tocharian A pracar (cognate)