Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Primitive Irish ᚋᚐᚊᚊᚔ

→ Irish mac (inherited)
→ Scottish Gaelic mac (inherited)
→ Manx mac (inherited)
→ Middle Irish mac (inherited)
→ Old Irish macc (inherited)