Dewaldt Otto Duvenage (born 22 May 1988) is a South African rugby union footballer. He plays as a scrum-half for Benetton in the Pro14. He signed a deal to join French Top 14 side Perpignan in 2013. He joined Benetton prior to the 2017–18 Pro14 season. He also had a spell playing for Perpignan in the French Top 14 from 2013 to 2016. In 2008 he played for South Africa U20 and in 2017 for South Africa 'A'.