Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*bledyos
→
Breton
bleiz
(inherited)
→
Gaulish
ble
(inherited(cel-gau/ca))
→
Welsh
blaidd
(inherited)
→
French
Blois
(derived)
→
Cornish
bleydh
(inherited)