the von in a German or Austrians name means "of", it was also designated as a sign of rank, more or less like being knighted. so for example the Napoleonic era Prussian general August von Gnesinau...
Bismarck was a Lutheran like most of the Junker statesmen
Heinrich von Herzogenberg was born on June 10, 1843.
Heinrich von Herzogenberg died on October 9, 1900 at the age of 57.
Otto Von Bismarck was born at Schönhausen, Prussia on April 1st 1815.