Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
étrum
←
Old Irish
é-
(affix)
←
Old Irish
trom
(affix)
→
Irish
éadrom
(inherited)
→
Scottish Gaelic
aotrom
(inherited)