Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
hos
←
Breton
houad
(cognate)
←
Irish
aoi
(mention)
←
Latin
avis
(cognate)
→
Breton
houad
(cognate)
→
Welsh
hwyad
(cognate)