What was the name of the band black sabbath before it was called black sabbath and was Ozzy the original singer?

Before they were called Black Sabbath, the band was known as Earth. Ozzy Osbourne was indeed the original singer of the band when they adopted the name Black Sabbath in 1969. The group's lineup, featuring Tony Iommi, Geezer Butler, and Bill Ward alongside Ozzy, became iconic in the heavy metal genre.