Frederika Louisa of Hesse-Darmstadt Queen consort of Prussia (1751–1805) Parents Countess Palatine Caroline of Zweibrücken Louis IX, Landgrave of Hesse-Darmstadt Children Frederick William III of Prussia Wilhelmine of Prussia, Queen of the Netherlands Princess Augusta of Prussia Princess Christine of Prussia Prince Wilhelm of Prussia Prince Louis Charles of Prussia Prince Henry of Prussia Siblings Landgravine Caroline of Hesse-Darmstadt Natalia Alexeievna of Russia Landgravine Louise of Hesse-Darmstadt Landgravine Amalie of Hesse-Darmstadt Prince Christian of Hesse and by Rhine Louis I, Grand Duke of Hesse Friedrich von Hessen-Darmstadt Partners Friedrich Wilhelm II of Prussia