Tetragrammaton Records

A onetime musical record label, founded by artist manager Roy Silver with Bruce Post Campbell and comedian Bill Cosby in the 1960s.

Tetragrammaton's biggest act was the rock band Deep Purple in its first incarnation. They were also responsible for distributing John Lennon and Yoko Ono's Unfinished Music No.1: Two Virgins album in the United States, after Capitol Records (Lennon's then-label) refused to handle it, because of its nude cover photo of the pair.

Despite having some popular artists, Tetragrammaton suffered bankruptcy in the early 1970s. Years later, some reissues appeared of old Tetragrammaton albums, but these were of poor, bootleg record quality, pressed and released by a company who had the rights to the label's name.