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.
Jean-Claude van Damme is a Roman Catholic.
Claude-Jean-Baptiste Hoin died in 1817.
Jean-Claude Van Damme is 5'8" tall.
Jean-Claude Hesselbarth has written: 'Jean-Claude Hesselbarth'
Jean Claude died in 1687.
Jean Claude Billmaier is 187 cm.
Jean Claude Leuyer is 6' 3".
Jean-Claude Decaux was born in 1938.
Jean-Claude Pressac died in 2003.
Jean-Claude Pressac was born in 1944.
Jean-Claude Mathis was born in 1939.
Jean-Claude Logé was born in 1941.
Jean-Claude Lavaud died in 2011.
Jean-Claude Paye was born in 1934.
Jean-Claude Olry was born in 1949.