The Old English word "beorn" (warrior, man) does not come from the same root as
"beorht" (bright, shining). "Beorn" is an interesting word, though. According
to the little book of Old English vocabulary that I have with me at the moment,
"beorn" is a word that is found only in Old English poetry. Here is the
full entry for "beorn":
beorn, "warrior, man, hero"
Beorn may be etymologically related to bearn "child, son," with
which it is easily confused in any case, or it may be a poetic metaphor whose
original sense, "bear," was lost. The phonetically corresponding
Icelandic word means "bear" exclusively. (The Old English Dictionary
observes that Old English eofor "boar" has an Icelandic cognate which
means "warrior, man" exclusively.) Beorn is found only in
poetry..."
from: Word-Hoard: An Introduction to Old English Vocabulary by Stephen
A. Barney.
I don't know if this clarifies or complicates anything, but there you
are.
Frodo rents a DVD

"Hey, this Elijah guy is pretty good!"