Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Walloon
deus
←
French
deux
(cognate)
←
Old French
deus
(inherited)
←
Latin
duōs
(inherited)
←
Latin
duo
(mention)