Glaedis recently shared a useful link for Beorning characters. :)
"The term Beorning seems to indicate either a descendant of Beorn or simply one of the tribe whom he came to rule as chief. Beorn as an individual should be well-known from . He was an huge man who was a skin-changer -- taking the shape of a huge black bear at times. At that time (2941) he was well-established but lived by himself with only animals around him in a house in in the Vales of Anduin near the western eaves of Mirkwood."