Where does “Червеев” come from?

Червеев (Bulgarian) comes from Bulgarian че́рвей, from Proto-Slavic čьrvьjь, from Proto-Slavic čьrvь, from Proto-Balto-Slavic kírmis, from Proto-Indo-European kʷŕ̥mis — worm.

Ancestry of “Червеев”, step by step

StepLanguageWordMeaning
1Bulgarianче́рвейworm bilateral [[protostome
2Proto-Slavicčьrvьjь—
3Proto-Slavicčьrvьworm, larva
4Proto-Balto-Slavickírmisworm
5Proto-Indo-Europeankʷŕ̥misworm
Every word from Proto-Indo-European kʷŕ̥mis →Every word from Proto-Balto-Slavic kírmis →Every word from Proto-Slavic čьrvь →