Overview
Duchess Margaret of Schleswig-Holstein-Sonderburg (24 February 1583 – 10/20 April 1658), , official titles: Erbin zu Norwegen, Herzogin zu Schleswig, Holstein, Stormarn und der Dithmarschen, Gräfin zu Oldenburg und Delmenhorst), was a duchess from the House of Schleswig-Holstein-Sonderburg and through marriage Countess of Nassau-Siegen.
Biography
Margaret was born at Haus Sandberg am Alsensund near Sonderburg on 24 February 1583 as the youngest daughter of Duke John 'the Younger' of Schleswig-Holstein-Sonderburg and his first wife Duchess Elisabeth of Brunswick-Grubenhagen. Margaret's father was a younger brother of King Frederick II of Denmark.
Margaret married at Rotenburg Castle on 27 August 1603 to Count John VII 'the Middle' of Nassau-Siegen (, 7 June 1561 – Siegen Castle, 27 September 1623), the second son of Count John VI 'the Elder' of Nassau-Siegen and his first wife Landgravine Elisabeth of Leuchtenberg. John 'the Middle' was the widower of Countess Magdalene of Waldeck-Wildungen (1558 – Idstein Castle, 9 September 1599).
From Wikipedia (CC BY-SA 4.0).