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

→ Breton pemp (inherited)
→ Welsh pump (inherited)
→ Irish cúig (inherited)
→ Scottish Gaelic còig (inherited)
→ Manx queig (inherited)
→ Cornish pymp (inherited)
→ Latin quinque (mention)
→ Old Irish cóic (inherited)