Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
gar
←
Proto-Brythonic
*garr
(inherited)
←
Proto-Celtic
*garros
(inherited)
←
English
leg
(link)
→
Catalan
garra
(cognate)
→
Spanish
garra
(cognate)
→
Portuguese
garra
(cognate)