Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Irish
*maigdenas
→
Irish
maighdeanas
(inherited)
→
Scottish Gaelic
maighdeannas
(inherited)
→
Manx
moidynys
(inherited)