Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Ahern
←
Irish
Ó hEachtighearna
(derived)
←
Irish
each
(mention)
←
Irish
tighearna
(mention)
→
English
Ahearn
(mention)
→
English
Aherne
(mention)