Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
eddin
←
Irish
éadan
(cognate)
←
Old Irish
étan
(inherited)
→
Scottish Gaelic
aodann
(cognate)
→
Manx
oaie
(link)
→
Manx
far-eddin
(prefix)