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.
Adolf, Count Palatine of the Rhine
Adolf of the Rhine( 27 September 1300, Wolfratshausen – 29 January 1327, Neustadt) from the house of Wittelsbach was formally Count Palatine of the Rhine in 1319 – 1327.
He was the second son of Rudolf I, Duke of Bavaria and his wife Mechtild of Nassau.
He did n't really rule because his uncle Louis IV occupied the Palatinate until an agreement with Adolf's brothers and his son Rupert II, Elector Palatine of the Rhine was concluded in Pavia in 1329.
Louis IV, Elector Palatine
Louis IV, Count Palatine of the Rhine( 1 January 1424, Heidelberg – 13 August 1449, Worms) was an Elector Palatine of the Rhine from the House of Wittelsbach in 1436- 1449.
Rudolf II, Count Palatine of the Rhine
Rudolf II
"the blind" (8 August 1306 – 4 October 1353) was Count Palatine of the Rhine (see Palatinate) from 1329 to 1353.
He was born in Wolfratshausen, the son of Rudolf I, Duke of Bavaria, and Mechtild of Nassau, daughter of King Adolf of Nassau-Weilburg.
His uncle was Emperor Louis IV.
During his childhood, his father and his uncle fought over their inheritance.
After the death of his father, his family was placed under the guardianship of Duke Johann von Nassau, who was a partisan of the Austrian cause.
His uncle, Louis IV, Holy Roman Emperor had taken the Palatinate by force of arms.
In August 1322, the war finally came to an end, but only after Mechthild's death in June 1323, were the three nephews finally able to make peace with their uncle.
His sons inherited Bavaria and Rudolf
I's sons inherited the Upper Palatinate and the Palatinate in line with the Treaty of Pavia.
He was blind only in the last years of his life.
Rupert II, Elector Palatine
Rupert II, Count Palatine of the Rhine( 12 May 1325, Amberg – 6 January 1398, Amberg).
He was the Elector Palatine of the Rhine from the house of Wittelsbach in 1390 – 1398.
He was the elder son of Adolf, Count Palatine of the Rhine and Countess Irmengard of Oettingen.
On 13 February 1338 the Palatinate was divided between Rupert II and his uncle Rudolf II, Duke of Bavaria.
After the death of his other uncle, the Elector Rupert I( who had succeeded Rudolf II), on 16 February 1390 he was proclaimed Elector Palatine with the consent of Wenceslaus, King of the Romans.
In 1391 he banished Jews and prostitutes from the Palatinate, confiscated their property, and bequeathed it to the Ruprecht Karl University of Heidelberg.
In 1395 he promulgated the so- called" Rupertinische Konstitution" which was intended to provide for unity of the Palatinate.
Among other provisions, he incorporated to his realm the former Imperial Free City Neckargemünd.
He was buried in Schönau Abbey a Cistercian monastery in Heidelberg.
Rudolph II, Count Palatine of Tübingen
Rudolph II, Count Palatine of Tübingen( died 1 November 1247) was Count Palatine of Tübingen and Vogt of Sindelfingen.
He was the younger son of Rudolph I and his wife Matilda of Gleiberg, heiress of Giessen.
Margaret of Sicily, Countess Palatine of the Rhine
Margaret of Sicily or Margherita di Sicilia- Aragona( 1331 in Palermo – 1377 in Neustadt) was a Sicilian princess, daughter of the King Frederick III of Sicily and his wife Eleanor of Anjou.
In 1348 she married Rudolf II, Count Palatine of the Rhine, and was Countess Palatine of the Rhine until 1353, year of the husband's death.
Louis III, Elector Palatine
Louis III, Count Palatine of the Rhine( 23 January 1378 – 30 December 1436), was an Elector Palatine of the Rhine from the house of Wittelsbach in 1410 – 1436.
Sabina, Duchess of Bavaria
Sabina, Duchess of Bavaria( 1528 –1578) was the daughter of John II, Count Palatine of Simmern and Beatrix of Baden.
Agnes of the Palatinate
Agnes of the Palatinate( 1201 – 1267) was a daughter of Henry V, Count Palatine of the Rhine and his first wife Agnes of Hohenstaufen, daughter of Conrad, Count Palatine of the Rhine.
Agnes was Duchess of Bavaria by her marriage to Otto II Wittelsbach, Duke of Bavaria.

Question: When did Rudolf Ii, Count Palatine Of The Rhine's mother die?
Answer: 19 June 1323