Jan Axel Blomberg (Hellhammer, Hauptman Hammer, HH, Jan Axel von Blomberg, Mr. Hellhammer)
- Birth Date 2nd Aug 1969 (42 Years Old)
- Gender Male
- Birth Location Norway
- Music Style
Associated With
- THE KOVENANT 2009 - Present
- AGE OF SILENCE 2003 - Present
- THE KOVENANT 1999 - 2003
- COVENANT 1997 - 1999
- MAYHEM 1988 - Present
- ARCTURUS 1987 - 17 Apr 2007
- WINDS
- UMORAL
- BLOODY MARY
- CIRCLE OF CHAOS
Previously With
- GORGOROTH 2007 - 2008
- DEN SAAKALDTE Aug 2006 - 2007
- DIMMU BORGIR 2005 - 2007
- SHINING 2001 - 2004
- THORNS 2001 - 2001
- CARNIVORA 1999 - 2004
- TROLL 1998 - 2003
- IMMORTAL 1995 - 1995
- EMPEROR 1994 - 1994
- JORN
- MYSTICUM
- MEZZERSCHMITT
- TRITONUS
- MORTEM
- VIDSYN