Alexander, Duke of Schleswig-Holstein-Sonderburg

Alexander
Duke of Schleswig-Holstein-Sonderburg
Born	20 January 1573 Sønderborg
Died	13 May 1627(1627-05-13) (aged 54) Sønderborg- Beck
Spouse	Dorothea of Schwarzburg-Sondershausen
Issue	Ernest Günther, Duke of Schleswig-Holstein-Sonderburg-Augustenburg August Philipp, Duke of Schleswig-Holstein-Sonderburg-Beck Philip Louis, Duke of Schleswig-Holstein-Sonderburg-Wiesenburg
House	Schleswig-Holstein-Sonderburg
Father	John II, Duke of Schleswig-Holstein-Sonderburg
Mother	Elisabeth of Brunswick-Grubenhagen

Alexander, Duke of Schleswig-Holstein-Sonderburg, (20 January 1573 – 13 May 1627) was a Danish nobleman.

Alexander was born in Sønderborg (German: Sonderburg) in Schleswig, the third son of John II, Duke of Schleswig-Holstein-Sonderburg and Elisabeth of Brunswick-Grubenhagen. Because his elder surviving brother chose Ærø as his seat, Alexander received Sønderborg upon their father's death and was in practice its second duke. Alexander died in Sønderborg.

Alexander married Dorothea of Schwarzburg-Sondershausen, daughter of John Günther I, Count of Schwarzburg-Sondershausen, on 26 November 1604 in Oldenburg. They had eleven children:

• Johann Christian, Duke of Schleswig-Holstein-Sonderburg-Franzhagen (26 April 1607 – 28 June 1653). His grandson is Louis Charles, Duke of Schleswig-Holstein-Sonderburg-Franzhagen.
• Alexander Heinrich, Duke of Schleswig-Holstein-Sonderburg (12 September 1608 – 5 September 1657)
• Ernest Günther, Duke of Schleswig-Holstein-Sonderburg-Augustenburg (14 October 1609 – 18 January 1689)
• Georg Friedrich, Duke of Schleswig-Holstein-Sonderburg (18 December 1611 – 23 August 1676)
• August Philipp, Duke of Schleswig-Holstein-Sonderburg-Beck (11 November 1612 – 6 May 1675)
• Adolph, Duke of Schleswig-Holstein-Sonderburg (2 November 1613 – 1 February 1616)
• Anna Elisabeth, Duchess of Schleswig-Holstein-Sonderburg (5 February 1615 – 19 February 1616)
• Wilhelm Anton, Duke of Schleswig-Holstein-Sonderburg (2 April 1616 – 2 April 1616)
• Sophie Katharina, Duchess of Schleswig-Holstein-Sonderburg (28 June 1617 – 22 November 1696), wife of Anthony Günther, Count of Oldenburg
• Eleonore Sabine, Duchess of Schleswig-Holstein-Sonderburg (27 February 1619 – 27 February 1619)
• Philip Louis, Duke of Schleswig-Holstein-Sonderburg-Wiesenburg (27 October 1620 – 10 March 1689)

Ancestors

Ancestors of Alexander, Duke of Schleswig-Holstein-Sonderburg

16. Christian I of Denmark 8. Frederick I of Denmark 17. Dorothea of Brandenburg 4. Christian III of Denmark 18. John Cicero, Elector of Brandenburg 9. Anna of Brandenburg 19. Margaret of Thuringia 2. John II, Duke of Schleswig-Holstein-Sonderburg 20. John V, Duke of Saxe-Lauenburg 10. Magnus I, Duke of Saxe-Lauenburg 21. Dorothea of Brandenburg 5. Dorothea of Saxe-Lauenburg 22. Henry IV, Duke of Brunswick-Lüneburg 11. Catherine of Brunswick-Wolfenbüttel 23. Catherine of Pomerania 1. Alexander, Duke of Schleswig-Holstein-Sonderburg 24. Albert II, Duke of Brunswick-Grubenhagen 12. Philip I, Duke of Brunswick-Grubenhagen 25. Elisabeth of Waldeck 6. Ernest III, Duke of Brunswick-Grubenhagen 26. Ernest II of Mansfeld-Vorderort 13. Catherine of Mansfeld-Vorderort 27. Barbara of Querfurt 3. Elisabeth of Brunswick-Grubenhagen 28. Bogislaw X, Duke of Pomerania 14. George I, Duke of Pomerania 29. Anna of Poland 7. Margaret of Pomerania-Wolgast 30. Philip, Elector Palatine 15. Amalie of the Palatinate 31. Margaret of Bavaria