Yes - They are Brother and Sister.
No and they're not even related. The reason why Rob Van Dam is called Rob Van Dam is because when he first started to wrestle, he was given the name Rob Van Dam because his style was similar to Jean Claude and he has a similar appearance to him.
Jean-Claude Van Damme is left-handed.
Claude-Jean-Baptiste Hoin died in 1817.
Jean-Claude van Damme is a Roman Catholic.
Jean-Claude Van Damme is 5'8" tall.
Jean-Claude Hesselbarth has written: 'Jean-Claude Hesselbarth'
Jean Claude died in 1687.
Jean-Claude Irvoas died in 2005.
Jean-Claude Irvoas was born in 1949.
Jean-Claude Garoute was born in 1935.
Jean-Claude Simon was born in 1948.
Jean-Claude Viollet was born in 1951.
Jean-Claude Darouy was born in 1944.
Jean-Claude Darouy died in 2006.
Jean-Claude Rouget was born in 1953.
Jean-Claude Romand was born in 1954.
Jean-Claude Amiot was born in 1939.