Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
estren
←
Breton
estren
(cognate)
←
Proto-Brythonic
*estrọn
(inherited)
←
Middle Cornish
estren
(inherited)
←
Welsh
estron
(cognate)
←
Latin
extrāneus
(derived)