Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
Nadolig
←
Latin
nātālīcius
(derived)
←
Old Welsh
natolic
(inherited)
←
Middle Welsh
nadolig
(inherited)
→
Irish
Nollaig
(cognate)