William L. Howerdel is an American musician, best known as a founding member, guitarist, backing vocalist, songwriter, and producer for the band A Perfect Circle, as well as for his former solo project, Ashes Divide. Howerdel has recorded six studio albums across his career: four with A Perfect Circle, one under the moniker Ashes Divide, and one under his own name.

Mer de Noms is the debut studio album by American rock band A Perfect Circle. The album was released on May 23, 2000, and entered the Billboard 200 at No. 4, making it the highest ever Billboard 200 debut for a rock band's first album. It sold over 188,000 copies in the first week, and was certified platinum by the RIAA later that same year. Three singles were released in promotion of the album, "Judith", "3 Libras", and "The Hollow", all of which hit the top 20 of both the Billboard US Modern Rock and Mainstream Rock charts.