Heavy Metal KATATONIA Lineup Changes December 22, 2009 Atomm Leave a comment Fredrik “North” Norrman (guitar) and Mattias “Kryptan” Norrman (bass) have both left Sweden’s KATATONIA.Source Fredrik “North” Norrman (guitar) and Mattias “Kryptan” Norrman (bass) have both left Sweden’s KATATONIA.Source