Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
Frenk
→
Cornish
frenkek
(suffix)
→
Cornish
Frenkek
(suffix)
→
Cornish
Frenkes
(suffix)