Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
portádego
←
Spanish
portazgo
(cognate)
←
Galician
porta
(suffix)
←
Galician
-ádego
(suffix)
←
Latin
porta
(derived)
→
Galician
portaxe
(doublet)