Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
dúnn
←
Old Irish
do
(mention)
←
Old Irish
sinni
(mention)
→
Irish
dúinn
(inherited)
→
Irish
dhúinn
(inherited)
→
Scottish Gaelic
dhuinn
(inherited)
→
Manx
dooin
(inherited)