Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
bladona
←
Gaulish
*blātōnā
(borrowed)
←
Gaulish
blātunā
(mention)
←
Proto-Celtic
*blātus
(derived)