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.
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.
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.
Adolf of Nassau (1362-1420)
Adolf, Count of Nassau- Dillenburg( 1362–1420) was a son of Count John I, Count of Nassau- Dillenburg and Margareta of the Marck.
After the death of his father, Count John I, in 1416 the lands were not divided, but instead overseen by the four brothers Adolf, John II, Engelbert I and John III.
Adolf ruled over Dietz, together with his father- in- law.
After the death of Adolf of Nassau, his son-in- law Godfrey of Eppstein inherited Dietz and a part of the lands 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.
Adolf of Nassau (1540–1568)
Adolf of Nassau (Dillenburg, 11 July 1540 – Heiligerlee, 23 May 1568) was a count of Nassau, also known as Adolphus of Nassau.
He was the fourth son and sixth child of William I, Count of Nassau-Dillenburg and Juliana of Stolberg.
He was the second youngest brother of William the Silent.
Mechtild of Nassau
Mechtild of Nassau( before 1280 – 19 June 1323) was the youngest child of Adolf of Germany and his wife Imagina of Isenburg- Limburg.
Mechtild is also known as" Matilda of Nassau".
She was Duchess consort of Bavaria, by her marriage to Rudolf I, Duke of Bavaria.
Juliana of Stolberg
Juliana, Countess of Stolberg-Wernigerode (15 February 1506 in Stolberg, Saxony-Anhalt – 18 June 1580) was the mother of William the Silent, the leader of the successful Dutch Revolt against the Spanish in the 16th century.
Juliana was born in Stolberg as the daughter of Bodo VIII, Count of Stolberg-Wernigerode and Anna of Eppstein-Königstein.
She was raised a Roman Catholic but changed her religion twice, first to Lutheranism and later to Calvinism.
She, along with her second husband, was a convinced Protestant and raised their children in the Protestant ways.
After the death of her second husband in 1559 she remained living at Dillenburg castle, now belonging to her second son John, where she died in 1580.
Her entire life, she kept close to her children, especially William.
When William began his rebellion against Philip II of Spain she supported her son morally and financially.
Because of this financial support, William was able to campaign against Spain in the Netherlands.
A fictionalized account of her life is found in Ethel Herr, Dr. Oma: The Healing Wisdom of Countess Juliana Von Stolberg (P&R Publishing, 2006).
Imagina of Isenburg-Limburg
Imagina of Isenburg- Limburg( ca. 1255 – 29 September 1313?) was the Queen consort of Adolf of Nassau, King of Germany.
Adolf of Altena
Adolf of Altena, Adolf of Berg or Adolf of Cologne,( c. 1157 – 15 April 1220 in Neuss) was Archbishop of Cologne from 1193 to 1205.

Question: Who is the maternal grandfather of Adolf Of Nassau (1540–1568)?
Answer: Bodo VIII, Count of Stolberg-Wernigerode