Ernest Casimir, Count of Nassau-Weilburg
Ernest Casimir of Nassau- Weilburg( 15 November 1607 – 16 April 1655) was the founder of the" younger" line of Nassau- Weilburg.
He was a son of Louis II, Count of Nassau- Weilburg and his wife Anna Maria of Hesse- Kassel( 1567 – 1626).
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.
William the Silent
William I, Prince of Orange (24 April 1533 – 10 July 1584), also known as William the Silent or William the Taciturn (translated from), or more commonly known as William of Orange , was the main leader of the Dutch Revolt against the Spanish Habsburgs that set off the Eighty Years' War (1568–1648) and resulted in the formal independence of the United Provinces in 1581.
He was born in the House of Nassau as Count of Nassau-Dillenburg.
He became Prince of Orange in 1544 and is thereby the founder of the branch House of Orange-Nassau and the ancestor of the monarchy of the Netherlands.
Within the Netherlands, he is also known as Father of the Fatherland .
A wealthy nobleman, William originally served the Habsburgs as a member of the court of Margaret of Parma, governor of the Spanish Netherlands.
Unhappy with the centralisation of political power away from the local estates and with the Spanish persecution of Dutch Protestants, William joined the Dutch uprising and turned against his former masters.
The most influential and politically capable of the rebels, he led the Dutch to several successes in the fight against the Spanish.
Declared an outlaw by the Spanish king in 1580, he was assassinated by Balthasar Gérard (also written as "Gerardts") in Delft in 1584.
Maria of Nassau-Dillenburg
Maria of Nassau- Dillenburg( 1568- 1625) was a daughter of Count John VI" the Elder" of Nassau- Dillenburg and his first wife, Countess Elisabeth of Leuchtenberg.
Maria married
John Louis I, Count of Nassau- Wiesbaden- Idstein in 1588 and was the mother of:
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 Maria of Nassau (1556–1616)
Countess Maria of Nassau (7 February 1556, Breda – 10 October 1616, Buren) was the second daughter of William the Silent by his first wife Anna of Egmond and Buren.
She was named after William's first daughter, Maria, who had died in infancy.
Anna of Isenburg-Büdingen
Anna of Isenburg- Büdingen( 1460 – 27 July 1522 in Babenhausen) was a German noblewoman.
She was a daughter of Count Louis II of Isenburg- Büdingen and Countess Maria of Nassau- Wiesbaden- Idstein.
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.
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.

Question: What is the date of death of Countess Maria Of Nassau (1556–1616)'s father?
Answer: 10 July 1584