Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
rhech
←
Proto-Brythonic
*rrex
(inherited)
←
Proto-Celtic
*ɸrikkā
(inherited)
←
Proto-Indo-European
*perd-
(derived)
→
Old English
feortan
(cognate)