Louise Isabelle Alexandrine Augusta, Countess of Sayn-Hachenburg, Burgravine of Kirchberg, full German name: Luise Isabelle Alexandrine Auguste, Gräfin zu Sayn-Hachenburg, Burggräfin von Kirchberg (19 April 1772, Hachenburg – 6 January 1827, Vienna, Austrian Empire) was the Princess consort of Nassau-Weilburg (28 November 1788 – 9 January 1816) through her marriage to Frederick William, Prince of Nassau-Weilburg.
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Early life
Louise Isabelle was born as the only child of Burgrave Georg Wilhelm von Kirchberg, Count of Sayn-Hachenburg and Princess Isabelle Auguste Reuss of Greiz, both members of an ancient German nobility.
Marriage and family
As she was the only heir to her father Louise married Frederick William, Hereditary Prince of Nassau-Weilburg, fifth child and eldest surviving son of Charles Christian, Prince of Nassau-Weilburg and his wife, Princess Carolina of Orange-Nassau, on 31 July 1788 in Hachenburg. Frederick William succeeded to his father Charles Christian upon his death on 28 November 1788.
They had:
William, Duke of Nassau (14 June 1792 - 20 August/30 August 1839)
Auguste Luise Wilhelmine of Nassau-Weilburg (Weilburg, 5 January 1794 - Weilburg, 11 April 1796)
Henriette Alexandrine Friederike Wilhelmine (30 October 1797 – 29 December 1829). Married Archduke Charles, Duke of Teschen
Friedrich Wilhelm of Nassau-Weilburg, then of Nassau (Bayreuth, 15 December 1799 - Vienna, 6 January 1845). He married on 7 June 1840 Anna Ritter, Edle von Vallyemare (Vienna, 21 June 1802 - Paris, 17 June 1864), daughter of Joseph Ritter, Edler von Vallyemare (1772-1832), widow of Johann Baptist Brunold, created Gräfin von Tiefenbach in 1840. This was a morganatic marriage.
