Rear Admiral Jacob Andries Cornelius 'Jaap' Weideman (1936 - 1996) was a South African Navy officer. He joined the Navy in 1954 and in 1955 attended the South African Military Academy. In 1968 he commanded . In 1970 he became the first South African to qualify as a submariner and became the first Officer Commanding of SAS Maria van Riebeeck. In 1982 he was appointed as Inspector General (Navy).