Dušan "Duško" Popov, OBE (Serbian Cyrillic: Душан "Душко" Попов; 10 July 1912 – 10 August 1981) was a Serbian double agent who served as part of the MI6 and Abwehr during World War II, and passed off disinformation to Germany as part of the Double-Cross System.Popov was born into a wealthy family and was a practicing lawyer at the start of the war. He held a great aversion to Nazism, and in 1940, infiltrated the Abwehr, Germany's military intelligence service, which considered him a valuable asset due to his business connections in France and the United Kingdom. Popov provided the Germans misleading and inaccurate information for much of the war. Deceptions in which he participated included Operation Fortitude, which sought to convince German military planners that the Allied invasion of Europe would take place in Calais, not Normandy, thereby diverting hundreds of thousands of German troops and increasing the likelihood that Operation Overlord would succeed. Wikipedia
Who is popular today?