Mayhem

There are at least 5 artists under this name. Two Black Metal Bands, a Hardcore Punk Band and a Electronica Musician with this Nickname:
#1) Mayhem is a Norwegian black metal band which was originally formed in 1983, taking strong influence especially from Hellhammer/Celtic Frost, Venom and from earlier Bathory. The name "Mayhem" was taken from the title of the Venom song "Mayhem with Mercy". Much controversy has surrounded the band regarding various murders, suicides, and other forms of violence. Mayhem have moved through a variety of black metal styles, even going so far as delving into the areas of dark avant-garde industrial and electronica. The group (at least in its earliest incarnation; 1983-1993) are widely considered to be one of the cornerstone bands in the movement often labelled "the second wave" of black metal. In the years since, their influence has only grown.
The band's initial line-up consisted of Manheim on drums, Necrobutcher on bass guitar, Euronymous on guitar and Messiah on vocals. However, Messiah departed and was replaced by Maniac on vocals; later, Dead and Hellhammer replaced Maniac and Manheim, respectively, to complete what is regarded by many fans as the group's classic lineup.
By April 1991, Dead was dead, aged 22, having suffered a self-inflicted shotgun wound to the head and several lacerations to the wrists, inflicted by a hunting knife he had bought that day.