Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gwên
←
Proto-Brythonic
*gwen
(inherited)
←
Proto-Celtic
*gʷenom
(inherited)
→
Welsh
gwenu
(affix)
→
Welsh
cilwen
(affix)