Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
eboles
←
Welsh
ebol
(affix)
←
Welsh
-es
(affix)
→
Breton
ebeulez
(cognate)
→
Welsh
ebolesau
(affix)