Where does “Барбаров” come from?

Барбаров (Bulgarian) comes from Romanian barbar, from French barbare, from Medieval Latin barbarinus, from Latin barbaria, from Latin -ia, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Барбаров”, step by step

StepLanguageWordMeaning
1Romanianbarbarbarbarian
2Frenchbarbarebarbarian; Berber
3Medieval LatinbarbarinusBerber, pagan, Saracen, barbarian
4Latinbarbariaforeign country; barbarity, barbarism; brutality
5Latin-iaUsed to form a feminine abstract noun, usually...
6Latin-iusforming adjectives from nouns; nominative neuter...
7Proto-Italic-jōsForms comparative adjectives
8Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yósEvery word from Latin -iaEvery word from Latin -ius