West Frisian brein

← West Frisian brem (link)

← West Frisian brim (link)

← West Frisian breinsâlt (link)

← Proto-Germanic *bragną (inherited)

← Proto-Germanic *brīnijaz (inherited)

← Proto-Germanic *brīnaz (mention)

← Old Frisian brein (inherited)

→ English brain (cognate)

→ English brine (cognate)

→ Dutch brein (cognate)