Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
Cymreig
←
Proto-Brythonic
*kumrėɣig
(inherited)
←
Proto-Brythonic
*kömroɣ
(mention)
←
Welsh
Cymro
(suffix)
←
Welsh
-eg
(suffix)
→
Welsh
anghymreig
(compound)