Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
feilan
←
Old Irish
fáelán
(derived)
←
Old Irish
fáel
(mention)
←
Old Irish
Fáelán
(link)
→
Icelandic
feilan
(inherited)
→
Icelandic
Feilan
(inherited)