Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
prenañ
←
Proto-Brythonic
*prɨnad
(inherited)
←
Proto-Celtic
*kʷrinati
(inherited)
←
Proto-Indo-European
*kʷrinéh₂ti
(inherited)
←
Old Breton
prenaff
(inherited)
→
Old Irish
crenaid
(cognate)