John Vooren plays in this under nick name Terghl
"Dødheimsgard" is a contraction of three words: Død which means 'death', heim which means 'home' and gard which means (at least in this context) 'mansion'. A natural translation into English would be "Mansion of Death", alternatively Realm of the Dead/Death.
The red stuff that looks like blood in the cover of their album "666 International" is actually marmalade! That picture was taken in a marmalade factory and the band paid the artist a fortune to acquire the rights to use it.