Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
ffin
←
Proto-Brythonic
*fin
(inherited)
←
Latin
finis
(derived)
←
Old Welsh
fin
(inherited)
←
Middle Welsh
ffin
(inherited)