Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
arglwydd
←
Cornish
arlodh
(cognate)
←
Middle Welsh
arglwyð
(inherited)
→
Welsh
arglwyddes
(affix)
→
Cornish
arlodh
(cognate)