Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Greek
ομφαλός
←
Greek
αφαλός
(doublet)
←
Ancient Greek
ὀμφαλός
(derived)
→
Greek
αφαλός
(doublet)