Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Catalan
reig
←
Catalan
rei
(doublet)
←
Latin
rēgem
(inherited)
←
Latin
rēx
(mention)
←
Old Catalan
reig
(inherited)