Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
buan
←
Breton
buan
(cognate)
←
Proto-Celtic
*bīwonos
(inherited)
←
Proto-Indo-European
*gʷeyh₃-
(inherited)
←
Old Breton
buenion
(cognate)
→
Welsh
yn fuan
(mention)