Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
piago
←
Spanish
piélago
(cognate)
←
Ancient Greek
πέλαγος
(derived)
←
Latin
pelagus
(inherited)
←
Portuguese
pego
(cognate)
←
Old Portuguese
peego
(inherited)