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Frederick William III, Duke of Schleswig-Holstein-Sonderburg-Beck (4 November 1723 – 6 May 1757) was a son of Frederick William II and his wife, Ursula Anna of Dohna. He succeeded his father as Duke of Beck in 1749.
Frederick William was a recipient of the Order of the Red Eagle . He served as a colonel in the Prussian Army and was commander of the Füsilier Regiments No. 46 (Old-Württemberg). During the Seven Years' War , he fell in the Battle of Prague in 1757. He was unmarried and childless; he was succeed as Duke of Beck by his uncle Charles Louis .
Ancestry
Family of Frederick William III, Duke of Schleswig-Holstein-Sonderburg-Beck
16. Alexander, Duke of Schleswig-Holstein-Sonderburg 8. August Philipp, Duke of Schleswig-Holstein-Sonderburg-Beck 17. Dorothea of Schwarzburg-Sondershausen 4. Frederick Louis, Duke of Schleswig-Holstein-Sonderburg-Beck 18. William Louis, Count of Nassau-Saarbrücken 9. Marie Sibylle of Nassau-Saarbrücken 19. Anna Amalia of Baden-Durlach 2. Frederick William II, Duke of Schleswig-Holstein-Sonderburg-Beck 20. Alexander, Duke of Schleswig-Holstein-Sonderburg (= 16) 10. Ernest Günther, Duke of Schleswig-Holstein-Sonderburg-Augustenburg 21. Dorothea of Schwarzburg-Sondershausen (= 17) 5. Louise Charlotte of Schleswig-Holstein-Sonderburg-Augustenburg 22. Philip, Duke of Schleswig-Holstein-Sonderburg-Glücksburg 11. Auguste of Schleswig-Holstein-Sonderburg-Glücksburg 23. Sophie Hedwig of Saxe-Lauenburg 1. Frederick William III, Duke of Schleswig-Holstein-Sonderburg-Beck 24. Christopher von Dohna 12. Frederick, Burgrave of Dohna 25. Ursula of Solms-Braunfels 6. Christopher I, Burgrave and Count of Dohna-Schlodien 26. John III du Puy, Marquess of Montbrun-Ferrassieres 13. Sperentia du Puy de Montbrun-Ferrassieres 27. Antoinette of Poissant 3. Ursula Anna of Dohna-Schlodien 28. Christopher von Dohna (= 24) 14. Christian Albert, Burgrave and Count of Dohna 29. Ursula of Solms-Braunfels (= 25) 7. Frederice-Marie of Dohna-Vianen 30. John Wolfart of Brederode 15. Sophie Theodore of Brederode 31. Anna of Nassau-Siegen
References
Gottlob Friedrich Krebel, M. Gottlieb Schumanns genealogisches Hand-Buch , S.272, [1]