Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Occitan
occitan
→
Irish
Ocsatánais
(derived)
→
Occitan
Occitània
(suffix)
→
Occitan
occitanisme
(affix)