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 Simon was born in 1948.
Jean-Claude Brizard was born in 1964.
Jean-Claude Dunyach was born in 1957.
Jean-Claude Carle was born in 1948.
Jean-Claude Blanc was born in 1963.
Jean-Claude Vannier was born in 1943.
Jean-Claude Fruteau was born in 1947.
Jean-Claude Darouy was born in 1944.
Jean-Claude Darouy died in 2006.
Jean-Claude Gayssot was born in 1944.