Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
billardo
←
Proto-Celtic
*belyos
(derived)
←
Old French
billard
(borrowed)
←
Old French
bille
(derived)
←
Galician
billar
(doublet)
←
Proto-Indo-European
*bʰleh₃-
(derived)
→
Galician
billarda
(mention)