Henning Rudolf Adolf Karl von Holtzendorff was a German admiral during World War I, who became famous for his December 1916 memo about unrestricted submarine warfare against the United Kingdom. He was a recipient of Order of the Black Eagle and the Pour le Mérite with oak leaves and was one of just six Grand Admirals of the Imperial German Navy.
- Occupation
- military officer, politician, naval officer, Großadmiral
- Position held
- member of the Prussian House of Lords
- Citizenship
- Germany
- Born
- January 9, 1853
- Died
