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.
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.
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).
Johann V of Nassau-Vianden-Dietz
Johann V of Nassau-Vianden-Dietz (Breda, 9 November 1455 – Dillenburg, 30 July 1516) was count of Nassau (in Siegen, Dillenburg, Hadamar and Herborn), Vianden and Diez, and Lord of Breda.
He was the paternal grandfather of William the Silent.
He was the son of Jan IV of Nassau and his wife Maria of Loon-Heinsberg.
Johann V was in 1504 and 1505 stadtholder of Guelders and Zutphen.
In 1504, he inherited Breda and Vianden from his brother Engelbrecht II of Nassau.
Johann V married in 1482 to Elisabeth of Hesse-Marburg, a daughter of Henry III, Landgrave of Upper Hesse and his wife Anna of Katzenelnbogen.
They had 6 children:
Count Johann V was buried at Siegen.<br>
His Dutch possessions went to his eldest son Henry, his German possessions to his other son William.
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:
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.
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.
Maria of Nassau (1491–1547)
Maria, Countess of Nassau, Katzenelnbogen, Vianden and Dietz (1 February 1491, Vianden - 1547, Siegen) was a noblewoman from the Low Countries.
She was the second and youngest daughter of Johann V of Nassau-Vianden-Dietz and Elisabeth of Hesse-Marburg.
She was the aunt of William the Silent.
In Siegen on 17 February 1506 she married Jobst I, Count of Holstein-Schauenburg, with whom she had 12 children, including:
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.
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.

Question: Who is the paternal grandfather of Maria Of Nassau (1491–1547)?
Answer: Jan IV of Nassau