Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
dúnad
←
Old Irish
dún
(link)
←
Old Irish
dúnadach
(link)
←
Old Irish
dúnattae
(link)
→
Irish
dúnadh
(inherited)
→
Manx
dooney
(inherited)