Where does “Björn” come from?

Björn (Swedish) comes from Old Swedish biørn, from Old Norse Bjǫrn, from Proto-Germanic bernuz.

Ancestry of “Björn”, step by step

Step	Language	Word	Meaning
1	Old Swedish	biørn	—
2	Old Norse	Bjǫrn	—
3	Proto-Germanic	bernuz	—

Björn — Etymology, Origin & Word History | Etymology Explorer