Bulgarians
Bulgarians (, ) are a nation and South Slavic ethnic group native to Bulgaria and its neighbouring region, who share a common Bulgarian ancestry, culture, history and language. They form the majority of the population in Bulgaria, while in North Macedonia, Ukraine, Moldova, Serbia, Romania, Hungary, Albania and Greece they exist as historical communities. Etymology Bulgarians derive their ethnonym from the Bulgars. Their name is not completely understood and difficult to trace back earlier than the 4th century AD, but it is possibly derived from the Proto-Turkic word *bulģha ("to mix", "shake", "stir") and its derivative *bulgak ("revolt", "disorder"). Alternative etymologies include derivation from a compound of Proto-Turkic (Oghuric) *bel ("five") and *gur ("arrow" in the sense of "tribe"), a proposed division within the Utigurs or Onogurs ("ten tribes"). Citizenship According to art. 25(1) of Constitution of Bulgaria, a Bulgarian citizen shall be anyone born to at least one parent holding a Bulgarian citizenship, or born on the territory of the Republic of Bulgaria, should they not be entitled to any other citizenship by virtue of origin. Bulgarian citizenship shall further be acquirable through naturalization. About 85% of Bulgaria's population identified themselves as ethnic Bulgarians in 2021 Bulgarian census. Ethnogenesis