Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
edn
←
Proto-Brythonic
*edn
(inherited)
←
Proto-Celtic
*ɸetnos
(inherited)
←
Welsh
adar
(mention)
←
Welsh
adain
(mention)
←
Welsh
ehedeg
(mention)
←
Proto-Indo-European
*péth₂r̥
(inherited)
→
Welsh
adar
(mention)
→
Welsh
adain
(mention)