Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gwenwyn
←
Proto-Brythonic
*gwenuɨn
(inherited)
←
Latin
venēnum
(derived)
←
Old Cornish
guenoinreiat
(cognate)
←
Middle Welsh
gwenwyn
(inherited)