Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
aball
←
Proto-Celtic
*abalnā
(inherited)
→
Irish
abhaill
(inherited)
→
Irish
úllord
(mention)
→
Irish
abhlach
(mention)