Proto-Celtic *katus

→ Welsh cad (inherited)

→ Welsh cadarn (inherited)

→ French Caen (derived)

→ Irish cath (inherited)

→ Scottish Gaelic cath (inherited)

→ Galician Cadarnoxo (mention)

→ Ancient Greek κότος (cognate)

→ Manx cah (inherited)

→ Primitive Irish ᚉᚐᚈᚈᚒ (inherited)

→ Old Irish cath (inherited)

→ Old Armenian առաքինի (cognate)