Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
ec
←
Middle Irish
[[oc]], [[ac]], [[ic]]
(inherited)
←
Old Irish
[[oc]], [[occ]]
(inherited)
→
Scottish Gaelic
aig
(cognate)
→
Manx
g-
(link)