Jens Jonas Schroeter Jansen (19 September 1900 – 26 October 1975) was a Norwegian archivist. He was born in

Bærum Bærum () is a list of municipalities of Norway, municipality in the Greater Oslo Region in Akershus County, Norway. It forms an affluent suburb of Oslo on the west coast of the city. Bærum is Norway's fifth largest municipality with a populatio ...

as a son of vicar Jens Jonas Elstrand Jansen (1844–1912) and Jenny Therese Schroeter (1863–1942), and brother of

Einar Jansen Einar Jansen (27 March 1893 – 13 December 1960) was a Norwegian historian, genealogist and archivist. He was born in Røyken as the son of priest Jens Jonas Jansen (1844–1912) and Jenny Therese Schroeter (1863–1942). He was a nephew of Je ...

. In 1937 he married Hjørdis Sofie Berg. He finished his secondary education in 1918 and graduated from the

Royal Frederick University The University of Oslo (; ) is a public research university located in Oslo, Norway. It is the oldest university in Norway. Originally named the Royal Frederick University, the university was established in 1811 as the de facto Norwegian conti ...

with the cand.philol. degree in 1927 with a master's thesis on the

Treaty of Björkö The Treaty of Björkö, also known as the Treaty of Koivisto, was a secret mutual defence agreement signed on 24 July 1905 in Björkö between Wilhelm II of the German Empire and Tsar Nicholas II of Russia. Although Wilhelm was the chief author, ...

. He worked in the

National Archives of Norway The National Archives of Norway (''Riksarkivet'') is the institution responsible for preserving archive material from Norway, Norwegian state institutions, as well as contributing to the preservation of private archives. It does this work in cooper ...

from 1936 to 1956, and also worked as a consultant in the

Ministry of Foreign Affairs In many countries, the ministry of foreign affairs (abbreviated as MFA or MOFA) is the highest government department exclusively or primarily responsible for the state's foreign policy and relations, diplomacy, bilateral, and multilateral r ...

from 1949 to 1952. He was then the manager of Norsk Historisk Kjeldeskrift-Institutt from 1953 to 1970. He is also known as a co-editor of the

biographical dictionary A biographical dictionary is a type of encyclopedic dictionary limited to biographical information. Many attempt to cover the major personalities of a country (with limitations, such as living persons only, in ''Who's Who'', or deceased people o ...

Norsk Biografisk Leksikon is the largest Norwegian biographical encyclopedia. It is part of the '' Great Norwegian Encyclopedia''. Origin The first print edition (NBL1) was issued between 1923 and 1983; it included 19 volumes and 5,100 articles. Kunnskapsforlaget to ...

'' from 1954. He chaired the union Arkivarforeningen from 1938 to 1947 and was a board member of Kjeldeskriftfondet from 1940 to 1945 and of the Norwegian Genealogical Society from 1949. In private relations, he used the very conservative pre-1907 orthography. He died in 1975.

References

1900 births 1975 deaths People from Bærum University of Oslo alumni Norwegian archivists Norwegian encyclopedists Norwegian trade unionists 20th-century Norwegian writers {{Norway-academic-bio-stub