Louis IX, Landgrave of Hesse-Darmstadt Landgrave of Hesse-Darmstadt (1719–1790) (1719–1790) Parents Countess Charlotte of Hanau-Lichtenberg Louis VIII, Landgrave of Hesse-Darmstadt Children Natalia Alexeievna of Russia Prince Christian of Hesse and by Rhine Landgravine Amalie of Hesse-Darmstadt Landgravine Caroline of Hesse-Darmstadt Friedrich von Hessen-Darmstadt Frederika Louisa of Hesse-Darmstadt Louis I, Grand Duke of Hesse Landgravine Louise of Hesse-Darmstadt Siblings Prince Georg Wilhelm of Hesse-Darmstadt Karoline Luise of Hesse-Darmstadt Luise Auguste of Hesse-Darmstadt Johan Friedrich Carl of Hesse-Darmstadt Partners Ernestine Rosine Flachsland Marie Adelaide of Cheirouze, Countess of Lemberg Countess Palatine Caroline of Zweibrücken
