Ursula Kuczynski
CanadaspyFemaleb. 19079.0Global Dominance: 0.00%Ursula Kuczynski, codenamed Sonja, was a German-born Soviet spy who played a crucial role in the espionage efforts that supported the Soviet atomic bomb project during World War II. Her connections with scientists, particularly Klaus Fuchs, were instrumental in obtaining vital information regarding atomic research, which significantly aided the development of the Soviet nuclear program.
Power1,854
Reach41,445
Country presence
Recent news mentions
Ursula Kuczynski, code-named Sonya, was a Soviet spy who operated in various countries during the Cold War.
A beginner’s guide to reading Ben MacintyreThe Globe and Mail·Canada· 2026-09-26
Canada· 2026-09-26
Ursula Kuczynski, operating as Sonja, established a connection with atomic scientist Klaus Fuchs.
AK ⟩ Kuidas Nõukogude Liit varastas ameeriklastelt Fat ManiPostimees – major Estonian daily, est. 1857·
Estonia· 2025-08-09
Estonia· 2025-08-09
