From Wikipedia, the free encyclopedia
Louis IX
Portrait of Louis IX around 1780 in the Musée historique de Strasbourg
Landgrave of Hesse-Darmstadt
Reign12 October 1768 –
6 April 1790
Predecessor Louis VIII
Successor Louis X
Born(1719-12-15)15 December 1719
Died6 April 1790(1790-04-06) (aged 70)
( m. 1741; died 1774)
Marie Adelaide of Cheirouze, countess of Lemberg
( m. 1775)
Issue Caroline, Landgravine of Hesse-Homburg
Frederica Louisa, Queen of Prussia
Louis X and I
Amalie, Hereditary Princess of Baden
Wilhelmina Louisa, Tsarevna of Russia
Louisa Augusta, Grand Duchess of Saxe-Weimar-Eisenach
Prince Frederick
Prince Christian
House Hesse-Darmstadt
Father Louis VIII, Landgrave of Hesse-Darmstadt
Mother Countess Charlotte of Hanau-Lichtenberg

Louis IX of Hesse-Darmstadt ( German: Ludwig) (15 December 1719 – 6 April 1790) was the reigning Landgrave of Hesse-Darmstadt from 1768 to 1790.

Louis IX and his wife Countess Palatine Caroline of Zweibrücken became the most recent common ancestors of all current hereditary European monarchs on 8 September 2022 after Queen Elizabeth II of the United Kingdom, who was not a descendant, died and her son, Charles III, a descendant through his father, became king. [1]


Louis IX was a son of Louis VIII, Landgrave of Hesse-Darmstadt, and Charlotte of Hanau-Lichtenberg and Müntzenberg.

He was born in Darmstadt on 15 December 1719. On 12 August 1741, Louis married Caroline, daughter of Christian III, Duke of Zweibrücken. They had three sons and five daughters, including:

In 1775, Louis IX married Marie Adelaide of Cheirouze, countess of Lemberg. On 6 April 1790 Louis died in Pirmasens.


See also


  1. ^ "New Most Recent Common Ancestor of Reigning European Monarchs - The Royal Forums". Retrieved 2023-10-09.
  2. ^ Genealogie ascendante jusqu'au quatrieme degre inclusivement de tous les Rois et Princes de maisons souveraines de l'Europe actuellement vivans [Genealogy up to the fourth degree inclusive of all the Kings and Princes of sovereign houses of Europe currently living] (in French). Bourdeaux: Frederic Guillaume Birnstiel. 1768. p. 68.

External links

Louis IX, Landgrave of Hesse-Darmstadt
Cadet branch of the House of Hesse
Born: 15 December 1719 Died: 6 April 1790
Regnal titles
Preceded by Landgrave of Hesse-Darmstadt
Succeeded byas Grand Duke of
Hesse and by Rhine