Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
pira
→
Breton
per
(derived)
→
Welsh
pêr
(derived)
→
Middle Dutch
pere
(borrowed)
→
Cornish
per
(derived)
→
West Flemish
peire
(derived)