Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
tráthúil
←
Irish
tráth
(suffix)
←
Irish
úil
(suffix)
←
Old Irish
tráthamail
(inherited)
→
Irish
tráthúlacht
(suffix)
→
Manx
traaoil
(cognate)