"Frederick William George Adolphus, Landgrave of Hesse (German: Friedrich Wilhelm Georg Adolf von Hessen-Kassel; 25 November 1820 – 14 October 1884) was the only son of ...
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Wilhelm I, Landgrave of Hesse-Kassel-Rumpenheim and Princess Louise Charlotte of Denmark." - (en.wikipedia.org 05.01.2021)