About Niclas Gustaf Duncan
Lived 1711 – 1771 (aged 59). Niclas Gustaf Duncan was a spy.
Niclas Gustaf Duncan (20 November 1711 – 23 April 1771) was a Swedish post official and spy. Between 1743 and 1748, he was active as an agent of Carl Gustaf Tessin to act as a double agent in Swedish service and spy on the Russian diplomat Johann Albrecht Korff under the protect of acting as his spy on Herman Cedercreutz, who was the Swedish envoy in Russia at the time.
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Important facts
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Contemporaries
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Frequently asked questions
Who was Niclas Gustaf Duncan?
Swedish spy (1711-1771)
When was Niclas Gustaf Duncan born?
Niclas Gustaf Duncan was born on 20 November 1711 in Moscow.
When did Niclas Gustaf Duncan die?
Niclas Gustaf Duncan died on 23 April 1771.
What was Niclas Gustaf Duncan's occupation?
Niclas Gustaf Duncan was a spy.
Sources & further reading
· Wikipedia: Niclas Gustaf Duncan
· DBpedia: Niclas Gustaf Duncan
Cite this page
APA: Biography.guide. (2026). Niclas Gustaf Duncan. https://biography.guide/niclas-gustaf-duncan/
MLA: "Niclas Gustaf Duncan." Biography.guide, https://biography.guide/niclas-gustaf-duncan/.
Chicago: "Niclas Gustaf Duncan." Biography.guide. https://biography.guide/niclas-gustaf-duncan/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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