Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
soño
←
Spanish
sueño
(cognate)
←
Latin
somnium
(inherited)
←
Portuguese
sonho
(cognate)
←
Old Portuguese
sonno
(inherited)
→
Portuguese
sonho
(cognate)