Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
gouzout
←
Breton
bezañ
(mention)
←
Proto-Celtic
*wid-
(derived)
←
Welsh
gwybod
(cognate)
←
Welsh
gwybod
(cognate)
←
Proto-Indo-European
*weyd-
(derived)
←
Cornish
godhvos
(cognate)
←
Old Breton
gudbut
(inherited)
←
Old Breton
guzbut
(mention)
←
Middle Breton
gouzvout
(inherited)
→
Cornish
godhvos
(cognate)