Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
ailén
←
Old Irish
ail
(affix)
←
Old Irish
-án
(affix)
→
Irish
oileán
(inherited)
→
Scottish Gaelic
eilean
(inherited)
→
Manx
ellan
(inherited)