Where does “Негрев” come from?

Негрев (Bulgarian) comes from Romanian negri, from Romanian negru, from Latin Niger, from Proto-Indo-European negʷ- — bare, naked.

Ancestry of “Негрев”, step by step

StepLanguageWordMeaning
1Romaniannegrinominative/accusative masculine plural of negru;...
2Romaniannegrublack; dirty, grimy; black person
3LatinNigerA Roman agnomen, or "nickname"
4Proto-Indo-Europeannegʷ-bare, naked
Every word from Proto-Indo-European negʷ- →Every word from Latin Niger →Every word from Romanian negru →