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.

[2] Renato da Silva Rocha was born in Rio de Janeiro, in the bairro of São Cristóvão, on May 27, 1961, but his family had to move to Brasília in 1970, when he was nine years old, after his father, a military, was transferred there.

In 1981 he formed Dents Kents, alongside Fred (vocals), future Plebe Rude member Jander Bilaphra (drums) and Feijão (electric guitar).

In late 1984 he was invited to join Legião Urbana as bassist, after Renato Russo was unable to record his bass parts for their then-upcoming self-titled debut album after a suicide attempt in which he tried to slash his wrists.

On March 25, 2012, RecordTV's electronic journal Domingo Espetacular reported that Rocha was living in squalor in the streets of Rio de Janeiro.

[5] During his final years of life he was interned at a rehabilitation clinic in Cotia, São Paulo, thanks to the efforts of Renato Russo's son Giuliano Manfredini.