Isaac Deutscher was a Polish Marxist writer, journalist and political activist who moved to the United Kingdom before the outbreak of World War II. He is best known as a biographer of Leon Trotsky and Joseph Stalin and as a commentator on Soviet affairs. His three-volume biography of Trotsky was highly influential among the British New Left in the 1960s and 1970s.
Isaac D'Israeli was a British writer, scholar and the father of British Prime Minister Benjamin Disraeli. He is best known for his essays and his associations with other men of letters.
Isaac Erter was a Polish-Jewish satirist and poet of the Galician Haskalah. His Hebrew prose has been compared to that of writers Heinrich Heine and Ludwig Börne.