Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Latin -ittus
Proto-Italic *-tos (inherited)
Latin -ītus (mention)

English -ette (derived)
English -let (derived)
Spanish cabrito (mention)
Ido -et- (derived)
Italian -etto (mention)
Ligurian -étto (mention)
Portuguese -eta (derived)
Portuguese cabrito (mention)