Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
fuinneog
←
Irish
-óg
(affix)
←
Middle Irish
fuindeóc
(inherited)
←
Old Norse
vindauga
(derived)
→
Irish
cúlfhuinneog
(affix)
→
Irish
fuinneogach
(affix)
→
Manx
uinnag
(cognate)