Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
pèr
←
Proto-Celtic
*kʷaryos
(derived)
←
Welsh
pair
(cognate)
←
Irish
coire
(cognate)
←
Old Catalan
pèr
(inherited)
→
Catalan
perol
(affix)