Robert-Jean Gustave Longuet, (9 December 1901 β 19 March 1987) was a lawyer, journalist and militant socialist.
He was the son of Jean Longuet, and therefore the great-grandson of Karl Marx.
He notably rejected many overtures by Communists to whom it is said he often replied "No.
You have falsified my great-grandfather." He was a supporter of Charles De Gaulle during the Second World War.