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 Sensemat was born in 1951.
Jean-Claude Merlin was born in 1954.
Jean-Claude Briault was born in 1947.
Jean-Claude Martinez was born in 1945.
Jean-Claude Lenoir was born in 1944.
Jean-Claude Flory was born in 1966.
Jean-Claude Colliard was born in 1946.
Jean-Claude Hamel was born in 1929.