Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Breton
uuin
←
Proto-Brythonic
*gwɨnn
(inherited)
←
Proto-Celtic
*windos
(inherited)
→
Breton
gwenn
(inherited)
→
Breton
Gwenneg
(inherited)
→
Breton
Gwennin
(inherited)
→
Breton
Gwenole
(inherited)