Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Bulgarian
херцог
←
Bulgarian
военача́лник
(mention)
←
German
Herzog
(borrowed)
←
Hungarian
herceg
(cognate)
←
Serbo-Croatian
хѐрцег
(cognate)
←
Serbo-Croatian
Хѐрцеговина
(cognate)