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.
Maria Belgica of Portugal
Maria Belgica of Portugal, also known as Maria Belgica of Crato( born before 12 October 1598 – 28 July 1647), was the daughter of Manuel of Portugal, son of the self- proclaimed Portuguese king António of Crato, and Countess Emilia of Nassau( 1569 – 1629), the youngest daughter of William of Orange.
Countess Emilia Antwerpiana of Nassau
Countess Emilia Antwerpiana of Nassau( Antwerp, 9 December
1581- Landsberg, 28 September 1657) was the sixth and youngest daughter of William the Silent and his third wife, Charlotte of Bourbon.
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.
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.
Countess Emilia of Nassau
Countess Emilia of Nassau (10 April 1569 – 16 March 1629) was the third and youngest daughter of William the Silent and his second wife Anna of Saxony.
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.
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.
Manuel, Hereditary Prince of Portugal
Manuel of Portugal( c. 1568–22 June 1638) was the illegitimate son of António, Prior of Crato, pretender to the Portuguese throne during the 1580 Portuguese succession crisis.
He secretly married in 1597 Countess Emilia of Nassau, daughter of William the Silent and Anna of Saxony.
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.

Question: Where was the father of Countess Emilia Of Nassau born?
Answer: Dillenburg