Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
Breatnais
←
Irish
Breatain
(affix)
←
Irish
-is
(affix)
←
Old Irish
Bretnas
(inherited)
→
Scottish Gaelic
Breatannais
(cognate)