Breton keuz

← Proto-Brythonic *kọs (inherited)

← Proto-Brythonic *kọð (inherited)

← Proto-Celtic *kādos (inherited)

← Welsh caws (cognate)

← Proto-Indo-European *kéh₂dos (inherited)

← Proto-Indo-European *keh₂d- (mention)

← Cornish keus (cognate)

← Latin cāseus (derived)

← Old Breton cos (inherited)

← Middle Breton queux (inherited)

→ Welsh caws (cognate)