French bièvre

← Old English beofor (cognate)

← German Biber (cognate)

← Middle Dutch bever (cognate)

← Middle French bievre (inherited)

← Old French bievre (inherited)

← Proto-Germanic *bebruz (derived)

← Old High German bibar (cognate)

← Proto-Indo-European *bʰébʰrus (derived)

← Dutch bever (cognate)

→ English beaver (cognate)

→ French castor (mention)