Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Olga
←
English
Helga
(doublet)
←
Old Norse
heilagr
(derived)
←
Russian
О́льга
(derived)
→
English
Helga
(doublet)
→
Finnish
Oili
(cognate)