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

Knowledge 1: 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. [SEP] Knowledge 2: 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.
Knowledge 1: 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. [SEP] Knowledge 2: 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.
Knowledge 1: 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. [SEP] Knowledge 2: 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.

Answer: Margaret of Guelders