Bellatrix were an Icelandic rock group. The group was founded in 1992 in Keflavík as Kolrassa krókríðandi (Black-ass Hookrider) by four women, all aged sixteen: Elíza M Geirsdóttir (vocals and violin), Sigrún Eiríksdóttir (guitar), Ester Bíbí Ásgeirsdóttir (bass) and Birgitta Vilbersdóttir (drums).