Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle Welsh
newyn
←
Proto-Celtic
*nowinyos
(inherited)
←
Proto-Indo-European
*neh₂u-
(derived)
←
Old Irish
núna
(cognate)
→
Welsh
newyn
(inherited)