Beorn
From the Encyclopedia of Speculative Fiction - http://encyclopedia.wizards.pro
Beorn was a Northman, Beorning cheiftan. The people of Beorn once inhabited the North of the Anduin valley between the Misty Mountains and Mirkwood during the last centuries of the Third Age. They guarded the Ford of Carrock from the Orc and Wargs. Beorn was a berseker warrior who had the gift of 'skin changing' (for him, transforming into the form of a bear).
In the year 2941 T.A. (Third Age), Beorn provided shelter to Thorin Oakenshield and his company of dwarves, Hobbit and wizard, and later helped them to fight against an army of Orcs at the Battle of Five Armies.