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

→ Welsh cyll (inherited)
→ Irish coll (inherited)
→ Scottish Gaelic coll (inherited)
→ Galician costrán (derived)
→ Manx coull (inherited)
→ Latin corylus (cognate)
→ Old Irish coll (inherited)