Name Louis Landgrave | ||
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Issue Caroline, Landgravine of Hesse-HomburgFrederica Louisa, Queen of PrussiaLouis X and IAmalie, Hereditary Princess of BadenWilhelmina Louisa, Tsarevna of RussiaLouisa Augusta, Grand Duchess of Saxe-Weimar-EisenachPrince FrederickPrince Christian Spouse Countess Palatine Caroline of Zweibrucken (m. 1741) House Landgraviate of Hesse-Darmstadt Children Louis I, Grand Duke of Hesse Parents Louis VIII, Landgrave of Hesse-Darmstadt, Countess Charlotte of Hanau-Lichtenberg Similar People Princess Amalie of Hesse‑Darmstadt, Natalia Alexeievna, Charles Louis - Hereditar, Princess Wilhelmine of Baden, Caroline of Baden |
Louis IX of Hesse-Darmstadt (German: Ludwig) (15 December 1719 – 6 April 1790) was the Landgrave of Hesse-Darmstadt from 1768 - 1790. He 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 of Zweibrücken, daughter of Christian III, Duke of Zweibrücken. They had three sons and five daughters, including:
In 1775, Louis married Marie Adelaide of Cheirouze, countess of Lemberg. On 6 April 1790 Louis died in Pirmasens.
References
Louis IX, Landgrave of Hesse-Darmstadt Wikipedia(Text) CC BY-SA