Louis IX, Landgrave of Hesse-Darmstadt

Louis IX of Hesse-Darmstadt (Ludwig) (15 December 1719 – 6 April 1790) was the reigning Landgrave of Hesse-Darmstadt from 1768 to 1790. He was an ancestor of Queen Elizabeth II of the United Kingdom.

Marriage
On 12 August 1741, he married Caroline, daughter of Christian III, Duke of Zweibrücken.

Issue

 * 1) Princess Princess Karoline of Hesse-Darmstadt (1746–1821) married Frederick V, Landgrave of Hesse-Homburg
 * 2) Princess Friederike of Hesse-Darmstadt (1751–1805)  married King Friedrich Wilhelm II of Prussia and became Queen of Prussia
 * 3) Louis I, Grand Duke of Hesse (1753–1830) married Princess Luise of Hesse-Darmstadt
 * 4) Princess Amalie of Hesse-Darmstadt (1754–1832), married her first cousin Karl Ludwig, Hereditary Prince of Baden
 * 5) Princess Princess Wilhelmine of Hesse-Darmstadt (1755–1776) married Grand Duke Pavel Petrovich of Russia.
 * 6) Princess Princess Luise of Hesse-Darmstadt (1757–1830) married Karl August, Grand Duke of Saxe-Weimar-Eisenach
 * 7) Prince Friedrich of Hesse-Darmstadt (1759–1802)
 * 8) Prince Christian of Hesse-Darmstadt (1763–1830)
 * 9) A stillborn son (May 3, 1742)