Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gau
←
Breton
gaou
(cognate)
←
Welsh
euog
(link)
←
Welsh
cau
(mention)
←
Cornish
gow
(cognate)
→
Welsh
euog
(affix)