Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*wailannā
→
English
gull
(derived)
→
Welsh
gwylan
(inherited)
→
Cornish
goolan
(inherited)
→
Middle Irish
faílenn
(inherited)