Where does “Niedźwiedź” come from?

Niedźwiedź (Polish) comes from Old Polish niedźwiedź, from Proto-Slavic medvědь, from Proto-Slavic medu-ēdis.

Ancestry of “Niedźwiedź”, step by step

Step	Language	Word	Meaning
1	Old Polish	niedźwiedź	—
2	Proto-Slavic	medvědь	bear
3	Proto-Slavic	medu-ēdis	—

Niedźwiedź — Etymology, Origin & Word History | Etymology Explorer