Biren

According to the Old English Dictionary:

e; birene, an (v. byrene

biren

in Dict.); f. A she-bear :-- Ursa, ꝥ is on úre geðeóde byren ... Bebeád seó fǽmne þǽre byrene ... and seó byren hine lét gangan, Shrn. 47, 1-7. In loco que vocitatur birene-feld, C. D. ii. 76, 7. Byrene urse, Kent. Gl. 606. [O. H. Ger. berin ursa.] biren