Frederick William, Prince of Nassau-Weilburg
Frederick William, Prince of Nassau- Weilburg( 25 October 1768, The Hague – 9 January 1816, Weilburg) was a ruler of Nassau- Weilburg.
In 1806 he was given the title of Prince of Nassau, while his cousin, Prince Frederick Augustus of Nassau- Usingen, became the Duke of Nassau.
Frederick William died in January 1816, only two months before his cousin.
Both men were succeeded by Frederick William's son, William.
Henry I, Count of Nassau-Siegen
Henry I of Nassau- Siegen,( – between 13 July and 14 August 1343) was Count of Nassau- Siegen, a part of the County of Nassau, and ancestor of the House of Nassau- Siegen.
He comes from the Ottonian branch of the House of Nassau.
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.
Elisabeth of Nassau-Dillenburg, Countess of Wied
Elisabeth of Nassau-Dillenburg (1 December 1488 – 3 June 1559 in Dillenburg) was a member of the House of Nassau.
She was a daughter of John V of Nassau-Dillenburg and his wife Elisabeth of Hesse-Marburg.
Her brothers were Henry III of Nassau-Breda, John of Nassau-Vianden-Dietz, Ernest of Nassau and William the Rich.
Her sister was Maria of Nassau.
Agnes of Leiningen
Agnes of Leiningen( died after December 1299) was a countess of the House of Leiningen and by marriage Countess of Nassau.
She was probably Regent of the County of Nassau for some time for her youngest son.
Frederick Augustus, Duke of Nassau
Friedrich August, Duke of Nassau, Prince of Nassau- Usingen( 23 April 1738 in Usingen – 24 March 1816 in Wiesbaden) was the last Prince of Nassau- Usingen and, jointly with his cousin, Friedrich Wilhelm of Nassau- Weilburg, first Duke of Nassau.
He died without surviving male issue and was succeeded by his cousin's son, Wilhelm.
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.
Otto I, Count of Nassau
Otto I of Nassau,( † between 3 May 1289 and 19 March 1290) was Count of Nassau and is the ancestor of the Ottonian branch of the House of Nassau.
Walram II, Count of Nassau
Walram II of Nassau,( – 24 January 1276), was Count of Nassau and is the ancestor of the Walramian branch of the House of Nassau.
Agnes of Waiblingen
Agnes of Waiblingen( 1072/ 73 – 24 September 1143), also known as Agnes of Germany, Agnes of Poitou and Agnes of Saarbrücken, was a member of the Salian imperial family.
Through her first marriage, she was Duchess of Swabia; through her second marriage, she was Margravine of Austria.

Question: When did Countess Albertine Agnes Of Nassau's mother die?
Answer: 8 September 1675