There are at least 6 artists known as Beowulf. Also see Beowülf, a crossover thrash/hardcore punk band formed in Venice Beach, LA in 1981.
Note: These are photos from concerts where Beowulf played, so they may be of other bands that played the concert as well.
Beowulf / Psychosomatic / Head On Collision / Slip Into Coma
Uploaded by Sacramento Shows
Suicidal Tendencies / No Mercy / Beowulf / Hot Spit Dancers / Sea Hags
Uploaded by Sactoslacker