There are at least 12 bands called Hammerhead: 1) A noise-rock band from Fargo, North Dakota 2) A german hardcore punk band 3) A Tasmanian based melodic-hard rock band 4) A Heavy Metal band from the Netherlands active in 1983-85. 5) A Finnish Heavy Metal band from Central Finland 6) A Dutch Gabber artist named Richard Geurkoop (Orlando Voorn) 7) A Thrash band from São Paulo, Brazil. 8) A Skinhead band from USA. 9) A Hardcore band from Hornell Ny 10) A Hardcore band from Pennslyvania 11) Thrash Death Metal Act from India [