Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
suum
→
Corsican
so
(inherited)
→
French
le sien
(derived)
→
Old French
sien
(inherited)
→
Old French
soun
(derived)
→
Norman
san
(inherited)