Derwyddon Dr Gonzo was a Welsh-language funk and ska band from Llanrug, North Wales, formed in 2005. They won Cymdeithas yr Iaith Gymraeg's Battle of the Bands competition that year. Their EP, K.O./Madrach, was released in 2007 on Ciwdod Records. The band's breakthrough came with the release of their album Stonk! in 2009. Derwyddon Dr Gonzo achieved chart success, reaching Number 1 in Siart C2 (Welsh Language Music Chart). They were also recognized with awards for Best Live Band and Best Band at the Rock & Pop Awards on BBC Radio Cymru in 2009. The band disbanded in 2011.
