Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
ceirios
←
Breton
kerez
(cognate)
←
Proto-Brythonic
*kėres
(inherited)
←
Proto-Celtic
*keresyā
(inherited)
←
Ancient Greek
κεράσιον
(derived)
←
Ancient Greek
κερασός
(mention)
←
Cornish
keres
(cognate)
←
Latin
ceresium
(mention)
←
Latin
cerasium
(derived)
→
Cornish
keres
(cognate)