Roelof Erasmus van der Merwe (born 31 December 1984) is a professional cricketer who has played internationally for both South Africa and the Netherlands, one of the few players to represent more than one international team. From Johannesburg, van der Merwe made his first-class and List A debuts for Northerns during the 2006–07 season, before moving into franchise cricket with Titans the following season. An all-rounder he bowls left-arm orthodox spin and is a right-handed middle-order batsman. He played ODI and Twenty20 International cricket for South Africa between 2009 and 2011, playing 13 times in each format. van der Merwe gained a Dutch passport in June 2015, and was selected in the Netherlands squad for the 2015 ICC World Twenty20 Qualifier.