Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Church Slavonic
дъва
←
Proto-Indo-European
*dwóh₁
(derived)
←
Proto-Slavic
*dъva
(inherited)
→
Latvian
divi
(cognate)