Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*kenetlom
→
Welsh
cenedl
(inherited)
→
Irish
cineál
(inherited)
→
Scottish Gaelic
cineal
(inherited)
→
Old Welsh
kenedel
(inherited)
→
Old Irish
cenél
(inherited)