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

→ Catalan ton (inherited)
→ Catalan teu (inherited)
→ Italian tuo (inherited)
→ Latin tuus (derived)
→ Ligurian teu (inherited)
→ Portuguese teu (inherited)
→ Romanian tău (inherited)
→ Aromanian tãu (inherited)