Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
ferrador
←
Spanish
herrador
(cognate)
←
Galician
ferrar
(affix)
←
Galician
-dor
(affix)
←
Portuguese
ferrador
(cognate)