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

→ English Teuton (cognate)
→ Breton tud (inherited)
→ Gaulish touta (inherited)
→ Welsh tud (inherited)
→ Irish tuath (inherited)
→ Scottish Gaelic tuath (inherited)
→ Galician Toutón (mention)
→ Cornish tus (inherited)
→ Old Irish túath (inherited)