Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bourguignon
saivoi
←
Old French
savoir
(derived)
←
Latin
sapere
(derived)
←
Latin
sapio
(mention)
→
French
savoir
(cognate)