Johannetta of Sayn-Wittgenstein (1561–1622)
Johanetta of Sayn-Wittgenstein (15 February 1561 – 13 April 1622) was a daughter of Count Louis I of Sayn-Wittgenstein and his first wife, Anna of Solms-Braunfels, who was a relative of Amalia of Solms-Braunfels.
Prince Frederick William of Solms-Braunfels
Prince Frederick William of Solms- Braunfels( 22 October 1770 in Braunfels – 13 April 1814 in Slawentzitz) was a Prussian Major General.
He was the fourth son of Ferdinand William Ernest, 2nd Prince of Solms- Braunfels( 1721 – 1783) and Countess Sophie Christine Wilhelmine of Solms- Laubach( 1741 – 1772).
He became known mainly through his marriage to Princess Frederica of Mecklenburg- Strelitz.
She was the widow of Prince Louis Charles of Prussia( 1773 – 1796).
When she became pregnant in 1798, he married her in order to avoid a scandal.
The daughter died soon after birth.
Frederick William was alleged to have been strongly inclined to consume alcohol and had to quit military service in 1805 for health reasons.
He also lost his income and even his brother advised Frederica to divorce.
She was initially against it, but when in 1813, she met Ernest Augustus, King of Hanover( 1771 – 1851), she, too, wanted the divorce.
Before they got around to it, however, Frederick William died, in 1814 in Sławięcice.
Amalia of Solms-Braunfels
Amalia of Solms-Braunfels (31 August 1602, Braunfels – 8 September 1675, The Hague), was Princess consort of Orange by marriage to Frederick Henry, Prince of Orange.
She acted as the political adviser of her spouse during his reign, and acted as his de facto deputy and regent during his infirmity from 1640–47.
She also served as chair of the regency council during the minority of her grandson William III, Prince of Orange from 1650 until 1672.
She was the daughter of count
John Albert
I of Solms-Braunfels and countess Agnes of Sayn-Wittgenstein.
Christine Charlotte of Solms-Braunfels
Christine Charlotte of Solms- Braunfels( 10 November 1690 in Greifenstein – 16 October 1771 in Homburg) was a Countess of Solms- Braunfels by birth and by marriage Landgravine of Hesse- Homburg.
William, Prince of Solms-Braunfels
Wilhelm Christian Karl, 3rd Prince of Solms Braunfels (9 January 1759, in Braunfels – 20 March 1837, in Braunfels) was by succession an immediate Prince, then a nobleman and head of the Princely House of Solms-Braunfels, a Prussian major general and Hessian deputy.
Frederick Henry, Prince of Orange
Frederick Henry (29 January 1584 – 14 March 1647) was the sovereign prince of Orange and stadtholder of Holland, Zeeland, Utrecht, Guelders, Overijssel in the Dutch Republic from 1625 until his death in 1647.
The last seven years of his life he also was the stadtholder of Groningen (1640-1647).
As the leading soldier in the Dutch wars against Spain, his main achievement was the successful Siege of 's-Hertogenbosch in 1629.
It was the main Spanish base and a well-fortified city protected by an experienced Spanish garrison and by formidable water defenses.
His strategy was the successful neutralization of the threat of inundation of the area around 's-Hertogenbosch and his capture of the Spanish storehouse at Wesel.
Wolfgang Ernst I of Isenburg-Büdingen-Birstein
Wolfgang Ernst I, Count of Isenburg Büdingen( Birstein, 29 December 1560 Birstein, 21 May 1633) was a German count of the House of Isenburg.
He was count of Isenburg- Birstein from 1596 to 1633, after violently seizing power from Henry of Isenburg- Rönneburg.
Wolfgang was the son of Philipp II, Count of Isenburg- Büdingen in Birstein and Countess Irmengard of Solms- Braunfels.
Through his mother he was first cousin once removed of Amalia of Solms- Braunfels, Princess consort of Orange and first cousin of Johannetta of Sayn- Wittgenstein sister- in- law of William the Silent.
Countess Albertine Agnes of Nassau
Albertine Agnes of Nassau( April 9, 1634 – May 26, 1696), was regent of Friesland, Groningen and Drenthe during the minority of her son Henry Casimir II, Count of Nassau- Dietz.
She was the sixth child and fifth daughter of stadtholder Frederick Henry, Prince of Orange and Amalia of Solms- Braunfels.
Frederick William, Prince of Solms-Braunfels
Prince Frederick William of Solms- Braunfels( 11 January 1696 in Braunfels – 24 February 1761, Braunfels) was the first Prince of Solms- Braunfels.
He was the son of Count William Maurice of Solms- Braunfels( 1651 – 1724) and his wife Magdalene Sophie of Hesse- Homburg( 1660 – 1720), a daughter of William Christoph, Landgrave of Hesse- Homburg, and his first wife.
Ferdinand, Prince of Solms-Braunfels
Ferdinand Wilhelm Ernst, 2nd Prince of Solms- Braunfels( 8 February 1721 in Braunfels – 2 October 1783, ibid.) was the second Prince of Solms- Braunfels.
He was the son of Frederick William, Prince of Solms- Braunfels( 1696 – 1761) by his first wife Princess Magdalena Henrietta of Nassau- Weilburg( 1691 – 1725).

Question: What is the date of death of Amalia Of Solms-Braunfels's husband?
Answer: 14 March 1647