Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Galician
cuxo
←
Galician
cucho
(alter)
←
Galician
tuxo
(alter)
←
Ancient Greek
ποῖος
(cognate)
←
Latin
cuius
(inherited)
←
Latin
quī
(mention)
←
Old Portuguese
cujo
(inherited)