Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
llety
←
Breton
leti
(cognate)
←
Proto-Brythonic
*llettɨɣ
(inherited)
←
Welsh
lled
(affix)
←
Welsh
ty
(affix)
→
Breton
leti
(cognate)