Where does “Vontroba” come from?

Vontroba (English) comes from Silesian wōntroba, from Polish wątroba, from Proto-Slavic ǫtroba, from Proto-Slavic ǫtro, from Proto-Indo-European h₁ón-tr-om, from Proto-Indo-European h₁én — in.

Ancestry of “Vontroba”, step by step

StepLanguageWordMeaning
1Silesianwōntrobaliver
2Polishwątrobaliver
3Proto-Slavicǫtrobainternal organs, entrails, viscera
4Proto-Slavicǫtroinside, core
5Proto-Indo-Europeanh₁ón-tr-om—
6Proto-Indo-Europeanh₁énin
Every word from Proto-Indo-European h₁én →Every word from Proto-Indo-European h₁ón-tr-om →Every word from Proto-Slavic ǫtro →