Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
komz
←
Proto-Celtic
*kom-wep-s-
(inherited)
←
Proto-Celtic
*wepos
(mention)
←
Welsh
gwep
(cognate)
←
Ancient Greek
ἔπος
(cognate)
←
Latin
vox
(cognate)
←
Middle Breton
comps
(inherited)