Rufus Daniel Isaacs, 1st Marquess of Reading, was a British Liberal politician and judge, who served as Lord Chief Justice of England, Viceroy of India, and Foreign Secretary, the last Liberal to hold that post. The second practising Jew to be a member of the British cabinet, Isaacs was the first Jew to be Lord Chief Justice, and the first, and as yet, only British Jew to be raised to a marquessate.