Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
-rad
←
Welsh
-red
(cognate)
→
Welsh
-red
(cognate)
→
Irish
-ra
(inherited)
→
Manx
-rey
(inherited)
→
Old Irish
ingenrad
(affix)
→
Old Irish
caratrad
(affix)