Renato da Silva Rocha (May 27, 1961 – February 22, 2015), affectionately known as Billy or Negrete by his close friends, was a Brazilian musician and songwriter famous for being the bassist of influential rock band Legião Urbana from 1984 until 1989.
He helped to compose some of the band's most memorable songs, such as "Angra dos Reis", "Acrilic on Canvas", "Quase sem Querer" and "Daniel na Cova dos Leões".