Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Brett
←
English
Breton
(mention)
←
English
Brittany
(mention)
←
English
Briton
(mention)
←
English
Bret
(link)
←
Proto-Indo-European
*kʷer-
(root)