Aleksander Grigoryevich Kopatzky (Russian: Александр Григорьевич Копацкий; 1923-1982) was a Soviet double agent who was unmasked in 1961 by Anatoliy Golitsyn. Kopatzky also used the names Igor Orlov, Aleksandr Navratilov and Calvus, and his Soviet codenames were Erwin, Herbert and Richard. He married Eleanor Stirner, the daughter of a former SS functionary.