Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
Finnabair
←
Proto-Brythonic
*Gwɨnnohuɨβar
(cognate)
←
Old Irish
finn
(affix)
←
Old Irish
síabair
(affix)