Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Piedmontese
quatr
←
French
quatre
(cognate)
←
Italian
quattro
(cognate)
←
Proto-Italic
*kʷettwōr
(inherited)
←
Latin
quattuor
(inherited)