Schalk Willem 'Hond' van der Merwe is a former South African rugby union player who last played for the Free State Cheetahs in the Currie Cup. He previously played for the Golden Lions, the Free State Cheetahs and the Griffons in domestic South African rugby, for the Lions and the Southern Kings in Super Rugby, for Montpellier in the French Top 14 and for Irish Pro14 side Ulster. His usual position is prop. He joined Irish Pro14 side Ulster prior to the 2017–18 season. He was released on 4 December 2018 after making just three Pro14 appearances.