Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
Rúadán
←
Primitive Irish
ᚏᚑᚇᚐᚌᚅᚔ
(inherited)
←
Old Irish
rúad
(affix)
←
Old Irish
-án
(affix)
→
Irish
Ruadhán
(inherited)