Martin Ernest Dannenberg (November 5, 1915 – August 18, 2010) was an American insurance executive who served as chairman of the Sun Life Insurance Company for five decades. While serving as a counterintelligence officer in the United States Army during World War II with the U.S. Third Army, Dannenberg discovered an original copy of the Nuremberg Laws signed by Adolf Hitler. The document was in the personal possession of General George S. Patton and held by The Huntington Library until it was turned over to the United States National Archives days after Dannenberg's death.