Burgravine Louise Isabelle of Kirchberg
"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. Early life. Louise Isabelle was born as the only child of Burggraf Georg Wilhelm von , Count of Sayn-Hachenburg (1751-1777) and Princess Isabelle Auguste Reuss of Greiz (1752-1824). Marriage and family. As she was the  only heir to her father Louise married Frederick William, Hereditary Prince of Nassau-Weilburg, 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 four children: