Which member of Black Sabbath came up with their name after a disturbing apparition?

The Black Sabbath story began in Birmingham, England, where Ozzy Osbourne, Tony Iommi, Geezer Butler and Bill Ward were looking to escape a life of factory work through music. The four musicians got their start in such psychedelic outfits as the Rare Breed and Mythology. Influenced by the reigning British blues bands - Led Zeppelin, Cream and John Mayall’s Bluesbreakers - the four of them formed Earth Blues Company (shortened to Earth), in 1968.

Everything changed when Butler came to the band with an idea for a song inspired by a disturbing apparition. A fan of horror films and the black magic-themed novels of Dennis Wheatley, he flirted briefly with the black arts. But when he saw what he believed to be a figure from the dark side at the foot of his bed one night, he ceased his dabblings in the goth world.

A cinema across the street from the band's rehearsal room was showing the 1963 horror film Black Sabbath starring Boris Karloff. While watching people line up to see the film, Butler noted that it was "strange that people spend so much money to see scary movies". With lyrics by Osbourne, the group composed a song about the visitation, entitling it “Black Sabbath”. It provoked a reaction in audiences unlike anything else in their repertoire, and they knew they’d stumbled onto something powerful and unique. Forced to change their name because there was already another band named Earth, they made an obvious choice: Black Sabbath.