Johann VII, Count of Nassau-Siegen

He was married twice. Firstly, he married on 9 December 1581 with Countess Magdalena of Waldeck, daughter of Count Philip IV of Waldeck-Wildungen and Jutta of Isenburg. They had the following children:

1. Johann Ernst (21 October 1582 – 27 September 1617), a general in the Venetian army, involved in the Uskok War;
2. Count John VIII of Nassau in Siegen (29 September 1583 – 27 July 1638)
3. Elisabeth (8 November 1584 – 26 July 1661), married on 26 July 1604 to Count Christian of Waldeck
4. Adolf (8 August 1586 – 7 November 1608)
5. Juliane (3 September 1587 – 15 February 1643), married on 22 May 1603 to Landgrave Maurice of Hesse-Kassel (or Hesse-Cassel)
6. Anna Maria (3 March 1589 – 27 February 1620), married on 3 February 1611 to Count John Adolf of Daun
7. Johann Albrecht, born and died in 1590
8. Count William of Nassau in Hilchenbach (13 August 1592 – 18 July 1642)
9. Anna Johanna (2 March 1594 – 7 December 1636), married on 14 June 1619 Johann Wolfart von Brederode
10. Frederick Louis (2 February 1595 – 22 April 1600)
11. Magdalena (23 February 1596 – 6 December 1662), married:
    1. in August 1631 to Bernhard Moritz von Oeynhausen;
    2. on 25 August 1642 Philipp Wilhelm zu Inn und Knyphausen
12. John Frederick, born and died in 1597

Secondly, he married on 27 August 1603 with Duchess Margaret of Schleswig-Holstein-Sonderburg, a daughter of John II, Duke of Schleswig-Holstein-Sonderburg and thus also a granddaughter of Christian III of Denmark. They had the following children:

1. Prince John Maurice of Nassau (18 June 1604 – December 1679)
2. Prince George Frederick Louis (23 February 1606 – 2 October 1674) married Mauritia Eleonora of Portugal, daughter of Emilia of Nassau, daughter of William the Silent and daughter-in-law of António, Prior of Crato.
3. William Otto (22 June 1607 – 14 August 1641)
4. Luise Christiane (8 October 1608 – 19 December 1678), married on 4 July 1627 Marquis Philippe de Conflans
5. Sophie Margarete (16 April 1610 – May 1665), married on 13 January 1656 to Count Georg Ernst of Limburg Stirum
6. Henry (9 August 1611 – 17 November 1652)
7. Marie Juliane (14 August 1612 – 21 January 1665), married on 13 December 1637 to Duke Francis Henry of Saxe-Lauenburg
8. Amalie (2 September 1613 – 24 August 1669), married:
   1. on 23 April 1636 to Herman Wrangel
   2. on 27 March 1649 to Christian Augustus, Count Palatine of Sulzbach
9. Bernhard (18 November 1614 – 6 January 1617)
10. Christian (16 July 1616 – April 1644)
11. Katharine (1 August 1617 – 21 August 1645)
12. Johann Ernst (8 November 1618 – 23 November 1639)
13. Elisabeth Juliane (1 May 1620 – 13 May 1665), married in 1647 to Count Bernhard of Sayn-Wittgenstein

Johann VII and both his wives are buried in the royal crypt in Siegen.

• The Wetterau Association of Counts (Wittgenstein, Nassau-Dillenburg-Siegen, Wied)