Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
kogh
←
Proto-Brythonic
*kox
(inherited)
←
Welsh
coch
(cognate)
←
Ancient Greek
κόκκος
(derived)
←
Latin
coccum
(borrowed)
→
Welsh
coch
(cognate)