John I, Count Palatine of Simmern
John I (German: Johann I.) (15 May 1459 – 27 January 1509) was the Count Palatine of Simmern from 1480 until 1509.
John was born in 1459 to Frederick I, Count Palatine of Simmern.
He married Joanna of Nassau-Saarbrücken the daughter of Johann II of Nassau
-Saarbrücken on 29 September 1481.
John died in Starkenburg in 1509 and was buried in Simmern.
Sabina, Duchess of Bavaria
Sabina, Duchess of Bavaria( 1528 –1578) was the daughter of John II, Count Palatine of Simmern and Beatrix of Baden.
John, Count Palatine of Gelnhausen
John, Count Palatine of Gelnhausen( 24 May 1698 in Gelnhausen – 10 February 1780 in Mannheim) was Count Palatine and Duke of Zweibrücken- Birkenfeld at Gelnhausen.
Stephen, Count Palatine of Simmern-Zweibrücken
Stephen of Simmern- Zweibrücken( 23 June 1385 – 14 February 1459, Simmern) was Count Palatine of Simmern and Zweibrücken from 1410 until his death in 1459.
He was the son of King Rupert of Germany and his wife Elisabeth of Nuremberg.
After the death of Rupert the Palatinate was divided between four of his surviving sons.
Louis III received the main part, John received Palatinate- Neumarkt, Stephen received Palatinate- Simmern and Otto received Palatinate- Mosbach.
In 1410, Stephen married Anna of Veldenz, who died in 1439.
After the death of Anna's father in 1444, Stephen also gained control of Veldenz and of the Veldenz share of Sponheim.
In the same year, he also divided the country between his sons Frederick I, who became Count Palatine of Simmern, and Louis I, who became Count Palatine of Zweibrücken.
In 1448 he succeeded to one part of Palatinate- Neumarkt and sold the other to his younger brother Otto.
He was buried in the" Schlosskirche", formerly the church of the Knights Hospitallers in Meisenheim.
John Christian, Count Palatine of Sulzbach
John Christian( 23 January 1700 – 20 July 1733;" in German: Johann Christian Joseph") was the Count Palatine of Sulzbach from 1732 – 33.
He was the second and youngest surviving son of duke Theodore Eustace, Count Palatine of Sulzbach( 1659 – 1732) with his consort Eleonore Maria Amalia of Hesse- Rotenburg( 1675 – 1720).
His elder brother was Joseph Charles, Count Palatine of Sulzbach.
Catherine of Pomerania, Countess Palatine of Neumarkt
Catherine of Pomerania( German:" Katharina von Pommern"; c. 1390- 4 March 1426), was a Pomeranian princess and Countess Palatine of Neumarkt.
She was the wife of John, Count Palatine of Neumarkt and the mother of Christopher of Bavaria, who would rule over Denmark, Sweden, and Norway as king of the Kalmar Union.
Frederick I, Count Palatine of Simmern
Frederick I, the Hunsrücker (German: Friedrich I.; 19 November 1417 – 29 November 1480) was the Count Palatine of Simmern from 1459 until 1480.
Frederick was born in 1417 to Stephen, Count Palatine of Simmern and Zweibrücken and his wife, Anna of Veldenz.
In 1444 his father partitioned his territories between Frederick and his younger brother Louis.
Frederick married Margaret of Guelders, daughter of Duke Arnold, on 16 August 1454.
Frederick died in Simmern in 1480 and was buried in the Augustinian Abbey of Ravengiersburg.
Louis Henry, Count Palatine of Simmern-Kaiserslautern
Louis Henry( German: Ludwig Heinrich)( 11 October 1640- 3 January 1674) was the Count Palatine of Simmern- Kaiserslautern from 1653 until 1673.
Georg, Count Palatine of Simmern-Sponheim
Georg( 20 February 1518 – 17 May 1569) was the Count Palatine of Simmern- Sponheim from 1559 until 1569.
George was born in 1518 to Johann II, Count Palatine of Simmern.
In 1559 his elder brother Frederick inherited the Electorate of the Palatinate and gave George his old territories inherited from his father in 1557.
George married Elisabeth of Hesse, daughter of Landgrave Wilhelm I, on 9 January 1541.
George died in 1569 and was succeeded in Simmern by his younger brother Reichard.
Reichard, Count Palatine of Simmern-Sponheim
Reichard (25 July 1521 – 13 January 1598) was the Count Palatine of Simmern-Sponheim from 1569 until 1598.
Reichard was born in Simmern in 1521 to Johann II, Count Palatine of Simmern.
In 1569 he succeeded his brother Georg as Count Palatine of Simmern-Sponheim.
Reichard died in Simmern in 1598.
Without any surviving children, Simmern-Sponheim was inherited by his great-nephew Frederick IV.

Question: Who is the mother of John I, Count Palatine Of Simmern?
Answer: Margaret of Guelders