Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
gavatx
←
Gaulish
*gauta
(mention)
←
Proto-Celtic
*gaba
(mention)
←
Spanish
gabacho
(cognate)
←
French
gavache
(cognate)