Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
hogen
←
Irish
pióg
(cognate)
←
Scottish Gaelic
pioghaid
(cognate)
←
Cornish
whyogen
(mention)