Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
seissed
←
Proto-Celtic
*swexstos
(inherited)
←
Old Irish
(mention)
←
Old Irish
cóiced
(mention)
→
Middle Irish
seissed
(inherited)