Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Murphy
←
Irish
Ó Murchadha
(derived)
←
Irish
Mac Murchaidh
(link)
←
Old Irish
Muircath
(link)
→
English
murphy
(mention)