There are at least 8 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
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

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