Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
Segovax
←
Proto-Celtic
*segos
(derived)
←
Proto-Celtic
*uako-
(mention)
←
Proto-Celtic
*wāstos
(mention)
→
Latin
Bellovaci
(mention)