Gerlach I, Count of Nassau
Gerlach I of Nassau (between 1275 and 1283 – 7 January 1361), Count of Nassau in Wiesbaden, Idstein, Weilburg, and Weilnau.
John I, Count of Nassau-Weilburg
John I of Nassau-Weilburg (1309–1371) was Count of Nassau-Weilburg from 1355 to 1371.
John I was the second son of Count Gerlach I of Nassau-Wiesbaden and Agnes of Hesse, granddaughter of Henry I, Landgrave of Hesse.
On Gerlach I abdication in 1346, John and his brothers divided the family lands.
John acquired Weilburg on the Lahn.
John was adopted by Emperor Charles IV in 1366 and elevated to Imperial Count.
He died on September 20, 1371.
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.
Princess Therese of Nassau-Weilburg
Princess Therese Wilhelmine Friederike Isabelle Charlotte of Nassau- Weilburg,( Terezya Vasilyevna Nassauskaya; 17 April 1815 in Weilburg, Duchy of Nassau – 8 December 1871 in Prague, Kingdom of Bohemia, Austria – Hungary) was a member of the House of Nassau- Weilburg and a Princess of Nassau- Weilburg by birth.
Through her marriage to Duke Peter of Oldenburg, Therese was also a Duchess of Oldenburg.
John III, Count of Nassau-Weilburg
John III of Nassau- Weilburg( 27 June 1441 – 15 July 1480) was count of Nassau- Weilburg as co-regent with his father.
He came from the Walramian branch of the House of Nassau.
Charles Christian, Prince of Nassau-Weilburg
Charles Christian, Prince of Nassau-Weilburg (Weilburg, 16 January 1735 – Münster-Dreissen, near Kirchheim, 28 November 1788), till 1753 Count of Nassau-Weilburg, was the first ruler of the Principality of Nassau-Weilburg between 1753 and 1788.
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).
Louis I, Count of Nassau-Weilburg
Count Louis I of Nassau- Weilburg( 1473 – 28 May 1523) was a son of Count John III of Nassau- Weilburg and his wife, Elisabeth of Hesse.
In 1492, Louis I succeeded his grandfather Philip II as Count of Nassau- Weilburg, because his father had already died in 1480.
In 1502, Louis I married Margaret( 1487- 1548), a daughter of Adolf III of Nassau- Wiesbaden- Idstein.
Louis and Margaret had the following children:
Louis II, Count of Nassau-Weilburg
Louis II of Nassau- Weilburg( 9 August 1565, Weilburg – 8 November 1627, Saarbrücken) was a count of Nassau- Weilburg.
Philip IV, Count of Nassau-Weilburg
Philip IV of Nassau- Weilburg, also known as Philip III of Nassau- Saarbrücken( 14 October 1542 in Weilburg – 12 March 1602 in Saarbrücken) was Count of Nassau- Weilburg from 1559 until his death and since 1574 also Count of Nassau- Saarbrücken.
Both possessions belonged to the Walram line of the House of Nassau.
In Weilburg, he was the fourth count named Philip, but only the third in Saarbrücken, because his father, Philip III of Nassau- Weilburg never held Nassau- Saarbrücken.

Question: What is the date of death of John I, Count Of Nassau-Weilburg's father?