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

→ English Gael (mention)
→ Breton Gouezel (derived)
→ Welsh Gwyddel (derived)
→ Irish Gael (derived)
→ Irish fiáin (derived)
→ Scottish Gaelic Gàidheal (mention)
→ Old Irish Goídel (derived)
→ Old Irish fíad (inherited)
→ Old Armenian վայր (cognate)