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

→ Breton dant (inherited)
→ Welsh dant (inherited)
→ Welsh dannoedd (mention)
→ Irish déad (inherited)
→ Scottish Gaelic deud (inherited)
→ Old Irish dét (inherited)