Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*-ikos
→
Welsh
-ig
(inherited)
→
Galician
Támega
(mention)
→
Galician
Támoga
(mention)
→
Galician
embelga
(derived)