Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Estonian
Jelena
←
Estonian
Helena
(doublet)
←
Ancient Greek
Ἑλένη
(derived)
←
Latin
Helena
(derived)
←
Russian
Еле́на
(borrowed)
→
Estonian
Helena
(doublet)