Abraham Leon (1918–1944) (born Abraham Wejnstok), was a Jewish Trotskyist. He was born in Warsaw but his family moved to Belgium where he grew up. Leon became a member and then leader of the Belgian branch of Hashomer Hatzair, a left wing Zionist youth movement. In 1940, after the beginning of World War II, Leon rejected Zionism and became a Trotskyist; around this time he joined the Belgian section of the Fourth International and became an organiser and leader against the National Socialist occupation and the "militarism" of Winston Churchill, exhorting Belgian workers to fight both Hitler and Churchill. He wrote The Jewish Question: A Marxist Interpretation, a work which remains a widely used Marxist analysis of Jewish socio-economic history. In June 1944 he was arrested and subsequently deported to Auschwitz where he died of illness in September.
- John Rose, "Karl Marx, Abram Leon and the Jewish Question: a reappraisal," International Socialism 119 (summer 2008).
- The Jewish Question: A Marxist Interpretation