Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Welsh
did
←
Proto-Celtic
*dīyos
(inherited)
←
Proto-Indo-European
[[*dyḗws]], [[*dyew-]]
(inherited)
←
Old Irish
día
(cognate)
→
Welsh
dydd
(inherited)
→
Middle Welsh
dyd
(inherited)