Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
bonedd
←
Proto-Celtic
*bonu-sed
(inherited)
←
Irish
bunad
(mention)
←
Old Welsh
bonhed
(inherited)
←
Old Welsh
bonhet
(mention)
→
Welsh
bonheddig
(suffix)