Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
aithgne
←
Old Irish
ad·gnin
(mention)
→
Irish
aithne
(inherited)
→
Irish
aithneach
(inherited)
→
Scottish Gaelic
aithne
(inherited)