Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Walloon
ptit
←
Old French
petit
(derived)
←
Latin
*pitittus
(mention)
←
Latin
pitinnus
(cognate)
←
Latin
pitulus
(mention)