Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
cavannus
←
Gaulish
*cawannos
(borrowed)
←
Proto-Celtic
*kuwannos
(derived)
→
French
chat-huant
(mention)