Noun
A German nobleman of a rank corresponding to that of an earl in England and of a count in France.
Source: Webster's dictionaryPierre Gassendi wrote that Tycho also had a tame elk (moose) and that his mentor the Landgrave Wilhelm of Hesse-Kassel (Hesse-Cassel) asked whether there was an animal faster than a deer. Source: Internet
Soon after her birth, Suttner's mother moved to live in Brno with her guardian Landgrave Friedrich zu Fürstenberg. Source: Internet