Friedrich Karl Ludwig, Duke of Schleswig-Holstein-Sonderburg-Beck
Friedrich Karl Ludwig, Duke of Schleswig-Holstein-Sonderburg-Beck (; 20 August 175724 April 1816) was the ninth and penultimate Duke of Schleswig-Holstein-Sonderburg-Beck. Friedrich Karl Ludwig was the son of Prince Karl Anton August of Schleswig-Holstein-Sonderburg-Beck and his wife Countess Charlotte of Dohna-Schlodien. Life. Friedrich Karl Ludwig was born in Königsberg, Kingdom of Prussia. He joined the Prussian Army in 1777 upon the request of King Frederick the Great. By 1781 he was a staff officer in the Regiment von Schlieben and by 1787 he  commanded a grenadier battalion based in Königsberg. He assisted in the suppression of the 1794 Kościuszko Uprising and was Governor of Kraków in 1795. He retired from Prussian service as a lieutenant general in 1797 and spent the rest of his life improving agriculture in Holstein. He died in Wellingsbüttel Manor, now part of Hamburg. He was a recipient of the Order of the Elephant, Order of St. Alexander Nevsky, Order of the Red Eagle, and the Order of Saint Hubert. Marriage and issue. Friedrich married Countess Friederike of Schlieben (28 February 1757 – 17 December 1827) on 8 March 1780  in Königsberg. At the time, the marriage was not looked upon favorably because the Schlieben family was not an ancient noble family. Friedrich and Friederike had three children: Friedrich was succeeded as duke by his son, Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg.