Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
pióg
←
Irish
pye
(affix)
←
Irish
-óg
(affix)
←
Scottish Gaelic
pioghaid
(cognate)
→
Cornish
hogen
(cognate)