Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
callo
←
Galician
coágulo
(doublet)
←
Latin
coagulum
(inherited)
←
Old Portuguese
*coallo
(inherited)
→
Galician
calleiro
(suffix)