Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
wylo
←
Breton
gouelañ
(cognate)
←
Middle Cornish
wole
(cognate)
←
Middle Cornish
ole
(mention)
←
Middle Breton
gouelaff
(cognate)
←
Middle Breton
goelaff
(mention)