Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
clann
←
Latin
planta
(derived)
←
Old Welsh
plant
(derived)
←
Old Irish
cland
(inherited)
→
Manx
cloan
(inherited)