J. Terblanche is a paralympic swimmer from South Africa competing mainly in category S8 events. Terblanche competed in the 1996 Summer Paralympics in Atlanta winning a gold and bronze medal. He won the gold in the 200m medley in a new world record time and won the bronze in the 100m butterfly. He also competed in the 50m freestyle, finishing eleventh overall in the heats and was disqualified in the 100m breaststroke.