Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
heini
←
Proto-Brythonic
*hoiniβ̃
(inherited)
←
Proto-Celtic
*sognīm-
(inherited)
←
Proto-Celtic
*su-
(mention)
←
Proto-Celtic
*gnīmus
(mention)
←
Welsh
gweini
(mention)
←
Irish
soghníomh
(cognate)