Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
centulo
←
Proto-Celtic
*Kentullos
(derived)
←
Proto-Celtic
*kentus
(mention)
←
Latin
Cintullus
(mention)