Dušan Popov
Dušan "Duško" Popov OBE (Serbian Cyrillic: Душан Душко Попов; 10 July 1912 – 10 August 1981) was a Serbian triple agent. During World War II he worked for the military intelligence and counterintelligence of the Kingdom of Yugoslavia under the code name "Duško". He also worked for MI6 under the code name "Tricycle" and the German Abwehr under the code name "Ivan".
Early years and education
Popov was born 10 July 1912 in Titel, Austro-Hungary (now Serbia), to a wealthy Serbian family. He had an older brother, Ivo – also a double agent, professionally trained as an attorney, before World War II – and a younger brother, Vladan. The Popov family moved to Dubrovnik when Duško was very young.
He spoke fluent German and had many highly placed German friends, but secretly despised the Nazis after earlier unpleasant brushes with them during his university years in Freiburg. Popov had earned a Ph.D. in Law there, and then returned to Dubrovnik to briefly open his own law firm.
Origins and operations of 'Tricycle'