Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Heffernan
←
Irish
Ó hIfearnáin
(derived)
←
Irish
ifreannach
(mention)
←
Irish
ifreann
(mention)