Where does “quorum” come from?

quorum (Polish) comes from Latin quōrum, from Proto-Italic kʷoi, from Proto-Indo-European kʷós — who.

Ancestry of “quorum”, step by step

StepLanguageWordMeaning
1Latinquōrumrelative
2Proto-Italickʷoiwho, what
3Proto-Indo-Europeankʷóswho
Every word from Proto-Indo-European kʷós →Every word from Proto-Italic kʷoi →Every word from Latin quōrum →
quorum — Etymology, Origin & Word History | Etymology Explorer