Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
dous
←
Spanish
dos
(cognate)
←
Latin
duōs
(inherited)
←
Latin
duo
(mention)
←
Portuguese
dois
(cognate)
←
Old Portuguese
dous
(inherited)