Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
English ethnonym
English ethn (confix)
English onym (confix)

English ethnonymic (suffix)
English ethnonymous (suffix)
English exoethnonym (prefix)
English endoethnonym (prefix)
English ethnonymics (affix)
English autoethnonym (prefix)
Italian -eo (link)