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

→ Breton don (inherited)
→ Welsh dwfn (inherited)
→ Irish domhain (inherited)
→ Scottish Gaelic domhainn (inherited)
→ Manx dowan (inherited)
→ Latin Dumnorix (derived)
→ Old Irish domun (inherited)