Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*belyom
→
French
birlo
(derived(fr/gl))
→
French
bille
(derived)
→
Irish
bile
(inherited)
→
Galician
billa
(derived)