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

→ Breton yaouank (inherited)
→ Welsh ieuanc (inherited)
→ Welsh ifanc (inherited)
→ Irish óg (inherited)
→ Scottish Gaelic òg (inherited)
→ Manx aa (inherited)
→ Manx aeg (inherited)
→ Old Irish óc (inherited)