Herzegovina

Etymology tree
Proto-Indo-European *ker-der.
Proto-Indo-European *kóryos
Proto-Germanic *harjaz
Proto-West Germanic *hari
Proto-Indo-European *dewk-?
Proto-West Germanic *togō
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Ancient Greek στρατηγός (stratēgós)calq.
Proto-West Germanic *harjatogō
Old High German herizogo
Middle High German herzog
German Herzogbor.
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Middle High German herzogbor.
Hungarian hercegbor.
Serbo-Croatian herceg
Proto-Indo-European *-usder.
Proto-Indo-European *-osder.
Proto-Slavic *-ovъ
Serbo-Croatian -ov
Proto-Indo-European *-iHneh
Proto-Balto-Slavic *-īˀnāˀder.
Proto-Slavic *-ina
Serbo-Croatian -ina
Serbo-Croatian Hercegovinabor.
English Herzegovina
A direct borrowing from Serbo-Croatian Hercegovina, from German Herzog (“duke”) + Serbo-Croatian -ov (possessive suffix) + Serbo-Croatian -ina (feminine suffix). Thus meaning, a Duke's possession, a dukedom.