Where does “biƀor” come from?

biƀor (Old Saxon) comes from Proto-Germanic bebruz, from Proto-Indo-European bʰébʰrus, from Proto-Indo-European bʰrew-, from Proto-Indo-European bʰer- — to bear, carry.

Ancestry of “biƀor”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	bebruz	beaver
2	Proto-Indo-European	bʰébʰrus	beaver
3	Proto-Indo-European	bʰrew-	to brew, boil; to boil, seethe; to brew, to...
4	Proto-Indo-European	bʰer-	to bear, carry

Every word from Proto-Indo-European bʰer- →Every word from Proto-Indo-European bʰrew- →Every word from Proto-Indo-European bʰébʰrus →