Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Donahue
←
Irish
Ó Donnchadha
(derived)
←
Irish
donn
(mention)
←
Irish
cath
(mention)
→
English
Donaghey
(mention)