Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
gên
←
Proto-Brythonic
*gen
(inherited)
←
Proto-Celtic
*genus
(inherited)
←
Proto-Indo-European
*ǵénus
(inherited)
→
Ancient Greek
γένυς
(cognate)