Date of Birth: 
About Johannes Marquart
- Johannes Anton Marquart or possibly Marquardt (born 27 September 1909 in Erolzheim in Germany) was a German actuarial and insurance mathematician.
- During World War II, Marquart was employed into the Germany Army Inspectorate 7/VI, in 1940, which would later become the General der Nachrichtenaufklärung.
- He would eventually become head of Referat Ia of Group IV of the organization in November 1944 engaged in research into German Army hand cryptographic systems.
- Prior to that period Marquart had been chief cryptanalysis in KONA 5.
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