Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
Kernow
←
Breton
Kernev
(cognate)
←
Proto-Brythonic
*Kernɨw
(inherited)
←
Middle Cornish
Kernow
(inherited)
←
Welsh
Cernyw
(cognate)
→
English
Kernow
(borrowed)
→
Breton
Kernev
(cognate)
→
Welsh
Cernyw
(cognate)