Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
noeth
←
Proto-Brythonic
*noɨθ
(inherited)
←
Proto-Celtic
*noxtos
(inherited)
→
Welsh
troednoeth
(affix)
→
Welsh
noethni
(affix)
→
Irish
nocht
(cognate)
→
Old Irish
nocht
(cognate)