Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
alpendre
←
Gaulish
*talopennos
(cognate)
←
Latin
appendix
(derived)
←
Occitan
alapens
(cognate)