Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cearnóg
←
Irish
(suffix)
←
Irish
óg
(suffix)
←
Old Irish
cern
(derived)
→
Manx
kerrin
(cognate)