Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
-awdwr
←
Proto-Brythonic
*-ọdr
(inherited)
←
Welsh
-wr
(affix)
←
Latin
-ātor
(derived)
←
Middle Welsh
-awdyr
(inherited)