Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
castanheiro
←
Latin
castanearius
(mention)
←
Portuguese
castanha
(mention)
←
Portuguese
-eiro
(mention)
→
Catalan
castanyer
(cognate)
→
Galician
castiñeiro
(cognate)
→
Galician
castiro
(cognate)