Where does “quòniam” come from?

quòniam (Catalan) comes from Latin quoniam, from Latin quom, from Proto-Indo-European kʷóm, from Proto-Indo-European kʷos, from Proto-Indo-European kʷ- — The primary interrogative root.

Ancestry of “quòniam”, step by step

StepLanguageWordMeaning
1Latinquoniamsince, forasmuch, now that
2LatinquomAlternative form of cum
3Proto-Indo-Europeankʷóm—
4Proto-Indo-EuropeankʷosSee *kʷis
5Proto-Indo-Europeankʷ-The primary interrogative root
Every word from Proto-Indo-European kʷ- →Every word from Proto-Indo-European kʷos →Every word from Proto-Indo-European kʷóm →