Alwyn Wilhelm Cornelius Johannes Hollenbach (born 14 June 1985) is a former South African rugby union footballer that mostly played as a centre. He represented the between 2005 and 2009, also making two appearances for their affiliated Super Rugby side the and playing two games for . In 2009, he moved to Johannesburg to play for the . He made 56 appearances for them and a further 25 for the in Super Rugby.
He retired from rugby during the 2015 season.