Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
Francach
←
Irish
Frainc
(affix)
←
Irish
-ach
(affix)
→
Scottish Gaelic
Frangach
(cognate)
→
Manx
Frangagh
(cognate)