Where does “Kaja” come from?

Kaja (Polish) comes from Latin caia, from Proto-Indo-European kh₂eyd- — to cut, hew.

Ancestry of “Kaja”, step by step

StepLanguageWordMeaning
1LatincaiaA cudgel
2Proto-Indo-Europeankh₂eyd-to cut, hew
Every word from Proto-Indo-European kh₂eyd- →Every word from Latin caia →
Kaja — Etymology, Origin & Word History | Etymology Explorer