Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Celtic *kʷākʷos

→ Welsh pob (inherited)
→ Irish gach (inherited)
→ Scottish Gaelic gach (inherited)
→ Manx dagh (inherited)
→ Cornish pob (inherited)
→ Old Irish cách (inherited)
→ Old Irish cach (derived)
→ Middle Welsh pawb (inherited)