Where does “Белперчинов” come from?

Белперчинов (Bulgarian) comes from Bulgarian бя́л, from Old Church Slavonic бѣлъ, from Proto-Slavic bělъ, from Proto-Indo-European bʰēlHs — white surface or stain.

Ancestry of “Белперчинов”, step by step

StepLanguageWordMeaning
1Bulgarianбя́лwhite
2Old Church Slavonicбѣлъwhite
3Proto-Slavicbělъwhite
4Proto-Indo-EuropeanbʰēlHswhite surface or stain
Every word from Proto-Indo-European bʰēlHs →Every word from Proto-Slavic bělъ →Every word from Old Church Slavonic бѣлъ →