Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
Conall
←
Proto-Celtic
*Kunowalos
(inherited)
←
Proto-Celtic
*kū
(compound)
←
Proto-Celtic
*walos
(compound)
→
Old Irish
Conn
(mention)