Where does “jeżeli” come from?

jeżeli (Silesian) comes from Polish jeżeli, from Polish li, from Old Polish li, from Proto-Slavic li — question-forming interrogative particle.

Ancestry of “jeżeli”, step by step

StepLanguageWordMeaning
1Polishjeżeli—
2Polishlionly; li, Chinese unit of distance; li, Chinese...
3Old Polishliinterrogative particle: introduces a yes-no question
4Proto-Slavicliquestion-forming interrogative particle
Every word from Proto-Slavic li →Every word from Old Polish li →Every word from Polish li →