Welsh caws

← Breton keuz (cognate)

← Proto-Brythonic *kọs (inherited)

← Cornish keus (cognate)

← Latin cāseus (derived)

← Old Welsh caus (inherited)

← Middle Welsh caws (inherited)

→ Breton keuz (cognate)

→ Welsh cawslyd (affix)

→ Welsh cosyn (mention)