Countess Palatine Caroline of Zweibrücken German noble (1721-1774) (1721–1774) Parents Caroline of Nassau-Saarbrücken Christian III, Count Palatine of Zweibrücken Children Landgravine Louise of Hesse-Darmstadt Natalia Alexeievna of Russia Friedrich von Hessen-Darmstadt Landgravine Amalie of Hesse-Darmstadt Louis I, Grand Duke of Hesse Prince Christian of Hesse and by Rhine Frederika Louisa of Hesse-Darmstadt Landgravine Caroline of Hesse-Darmstadt Siblings Christian IV, Count Palatine of Zweibrücken Countess Palatine Christiane Henriette of Zweibrücken Frederick Michael, Count Palatine of Zweibrücken Partners Louis IX, Landgrave of Hesse-Darmstadt