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

→ Breton nerzh (inherited)
→ Welsh nerth (inherited)
→ Irish neart (inherited)
→ Scottish Gaelic neart (inherited)
→ Manx niart (inherited)
→ Cornish nerth (inherited)
→ Latin Nertobriga (mention)
→ Old Irish nert (inherited)