Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
dooney
←
Irish
dúnadh
(cognate)
←
Scottish Gaelic
dùnadh
(cognate)
←
Manx
doon
(suffix)
←
Manx
ey
(suffix)
←
Old Irish
dúnad
(inherited)