Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old French
Peitiers
←
Latin
Pictāva
(inherited)
←
Latin
Pictāvium
(mention)
←
Latin
Pictāvis
(mention)
→
English
Poitiers
(derived)
→
French
Poitiers
(inherited)
→
Middle French
Poictiers
(inherited)
→
Occitan
Peitieus
(cognate)