Wilhelm Karl von Isenburg

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Wilhelm Karl Hermann Prince of Isenburg (born January 16, 1903 in Darmstadt ; † November 23, 1956 in Mülheim an der Ruhr ) was a German genealogist and NS clan researcher .


He was a son of the Hereditary Prince Leopold of Isenburg and Büdingen (March 10, 1866 - January 30, 1933) and his wife Princess Olga, nee Princess of Saxe-Weimar-Eisenach (September 8, 1869 - January 12, 1924) . After graduating from high school, von Isenburg studied history with a special focus on genealogy, which was to belong to his whole future life. As early as 1928 he published his work Genealogy as a subject. At the same time an introduction to their problems .

For him, genealogy was not just an auxiliary science, but a collective term for hereditary and spiritually related disciplines. Professionally, von Isenburg initially turned to the biological side and from 1929 worked as a genealogical assistant at the Pathopsychological Institute of the University of Bonn . Since 1933 he, who was also a member of the German Aristocratic Association without a regional division, acted there as a private lecturer in genetic research. In 1936 he moved to the Reich Office for Family Research of the Reich Ministry of the Interior in Berlin and from 1937 was an associate professor for family research in Munich .

From July 1, 1933, he was a member of the National Socialist Teachers' Association , and in the following years he was a member of the Supreme SA leadership as SA standard leader .

After the end of the Second World War , he was removed from office in 1946 and reinstated the following year. Only since 1946 his subject was called Historical Genealogy. In 1947 he was retired for health reasons. In 1932 he published a work on the ancestors of the German emperors and kings, in 1934 he provided a new introduction to family history, and from 1936 to 1937 the family tables on the history of European states, which were reissued in 1953 under the revision of Frank Freytag von Loringhoven . In between published works of Nazi Sippenforschung so in 1933 , the problem of racial purity , 1938, the clan customer and 1943, the clan and genealogy .

He was also the author of several articles in the Großer Brockhaus. Retired since 1947, von Isenburg died after a long suffering at the age of 53.


On April 30, 1930 he married Helene Elisabeth von Isenburg , who was the daughter of the forester from Hatzfeld (Eder) , Count Alfred von Korff , known as Schmising-Kerssenbrock, and his wife Helene, nee. Freiin von Hilgers, was born.


  • The racial purity problem. Beyer, Langensalza 1933.
  • Introduction to family studies. Quelle & Meyer, Leipzig 1934.
  • Shape change in the German nobility. Hausmann, Berlin 1935.
  • Kin lore. Stenger, Erfurt 1938.
  • Pedigree of the rulers of Europe and their wives. Stargardt, Berlin 1938.
  • Historical genealogy. Oldenbourg, Munich 1940.
  • Isenburg-Ysenburg. Stargardt, Berlin 1941.
  • Kin and family research. Carl Winter Univ. Verl., Heidelberg 1943.


  • Wolfgang Trogus: List of ancestors: Isenburg-Birstein, v., Wilhelm Karl , 2011. Digital version on genetalogie.de (August 14, 2011)
  • Wilhelm Heinrich Hammann: Pedigree of His Highness the Prince Wilhelm Karl von Isenburg , to 4096 ancestors plus 20 family tables, from which the ancestry of the prince can be seen from numerous dynasties, some of which are extinct or still flourishing today, and from individual historical personalities, according to printed sources and the like. Edit archives u. ed., Darmstadt 1913.
  • Friedrich von Klocke : Professor Wilhelm Karl Prince of Isenburg in memory , In: Hessische Familienkunde (HFK), Vol. 4, Issue 1, Col. 1-4., January 1957.
  • Felix von Schroeder: Prince Wilhelm Karl von Isenburg † , In: The family researcher in Bavaria, Franconia a. Schwaben Vol. 2, 1955-57, pp 49-50.
  • Eberhard Quadflieg: Wilhelm Karl Prince of Isenburg † , In: Communications of the West German Society for Family Studies 18, 1957–58, Sp. 157.
  • Gottfried Roesler: Wilhelm Karl Prinz von Isenburg † , In: Familie und Volk 6, 1957, p. 249.

Individual evidence

  1. ^ A b Racial hygiene as an educational ideology of the Third Reich