Jerzy Sosnowski

Jerzy Ksawery Franciszek Sosnowski (Lemberg, Austrian Galicia, 3 December 1896 – 1942, 1944, or 1945, in Poland or the Soviet Union) was a Major in Section II ("''Dwójka''") of the Polish General Staff and a Polish spymaster in the Weimar Republic and Nazi Germany (1926–1934), where he used the pseudonyms ''Georg von Nałęcz-Sosnowski'' and ''Ritter von Nalecz''.

In the Soviet Union, he was known as ''Jurek Sosnowski'', and some sources call him ''Stanislaw Sosnowski''. Provided by Wikipedia