There are at least 7 artists known as Beowulf. Also see Beowülf, a crossover thrash/hardcore punk band formed in Venice Beach, LA in 1981.
These are photos from concerts where Beowulf played, so they may be of other bands that played the concert as well.
Suicidal Tendencies / No Mercy / Beowulf / Hot Spit Dancers / Sea Hags Sep 13, 1985 Sacramento, California, United States Uploaded by Sactoslacker