Question: When did Gerhard Vii, Duke Of Jülich-Berg's wife die?

Knowledge 1: Gerhard VII, Duke of Jülich-Berg
Gerhard VII, Duke of Jülich-Berg (– 19 August 1475) was the son of William VIII of Jülich, Count of Ravensberg and Adelheid of Tecklenburg.Gerhard was the second duke of the combined Duchy of Jülich-Berg but the 7th Gerhard in the House of Jülich.Upon his father's death in 1428, Gerhard became Count of Ravensberg.In 1437, his uncle Adolf died without heirs and Gerhard inherited his title as Duke of Jülich-Berg.Gerhard continued his uncle's fight for the dukedom of Guelders, supported by King Albert II of Germany.In 1444 he won the Battle of Linnich but was unable to prevail in his fight for Guelders and ultimately sold his claim to Burgundy and acquired Blankenheim-Löwenberg and Heinsberg from Guelders.He was increasingly unable to govern his territories after 1461.His spouse Sophie of Saxe-Lauenburg then wielded regency for him. [SEP] Knowledge 2: Sophie of Saxe-Lauenburg
Sophie of Saxe-Lauenburg (born: before 1444; died: 9 September 1473) was a German regent, Duchess of Jülich-Berg by marriage to Gerhard VIII of Jülich-Berg, and regent of Jülich, Berg and Ravensberg for her eldest son William IV from 1456 until 1473.
Knowledge 1: Gerhard VII, Duke of Jülich-Berg
Gerhard VII, Duke of Jülich-Berg (– 19 August 1475) was the son of William VIII of Jülich, Count of Ravensberg and Adelheid of Tecklenburg.Gerhard was the second duke of the combined Duchy of Jülich-Berg but the 7th Gerhard in the House of Jülich.Upon his father's death in 1428, Gerhard became Count of Ravensberg.In 1437, his uncle Adolf died without heirs and Gerhard inherited his title as Duke of Jülich-Berg.Gerhard continued his uncle's fight for the dukedom of Guelders, supported by King Albert II of Germany.In 1444 he won the Battle of Linnich but was unable to prevail in his fight for Guelders and ultimately sold his claim to Burgundy and acquired Blankenheim-Löwenberg and Heinsberg from Guelders.He was increasingly unable to govern his territories after 1461.His spouse Sophie of Saxe-Lauenburg then wielded regency for him. [SEP] Knowledge 2: William V, Duke of Jülich
William V, Duke of Jülich( – 25/26 February 1361) was a German nobleman.Some authors call him William I, because he was the first" Duke of Jülich"; the earlier Williams had been" Count of Jülich".Other authors call the subject of this article" William VI"; they count the son and co-ruler of William IV as William V. William V was the eldest son of Gerhard V of Jülich and Elisabeth of Brabant- Aarschot, daughter of Godfrey of Brabant.William V was a key political figure of his time, being a brother- in- law to both Edward III of England and Emperor Ludwig IV.He spent enormous sums of money to have his brother Walram of Jülich appointed as Archbishop of Cologne over Adolph II of the Marck.In 1337 he was crucially involved in the German- English alliance which caused the start of the Hundred Years' War. William was an important supporter of Emperor Ludwig and for a time, he supported the Habsburgs against the House of Luxembourg in the Carinthian war of succession.Upon the collapse of the German- English alliance and the death of his brother- in- law, William switched his allegiance to Emperor Charles IV.In 1352 he initiated an inheritance tax on Heinsberg- Valkenburg/ Monschau.William won important positions through his Archbishop brother and also served for a time as a field captain for Flanders in the Hundred Years' War.His sons fought against him during an uprising of part of the Jülich knighthood which opposed inclusion in the increasing territorial state, and he was imprisoned by them in 1349, but released in 1351 due to public pressure.Upon his father's death in 1328, William became Count of Jülich.In 1336 William was appointed Margrave by his brother- in- law, Emperor Ludwig IV, and in 1356/ 57 he was raised to the level of Duke by Emperor Charles IV, thus becoming the first Duke of Jülich.His skillful marriage policy, especially the marriage of his son Gerhard to Margaret of Ravensberg, heiress of Berg and Ravensberg, enabled him to add territory to the house of Jülich.Upon William's death in 1361, the Duchy of Jülich passed to his second son, William, his eldest son having predeceased.William and his wife are buried in Nideggen.He seems to have held the title of Earl of Cambridge from 1340 to his death.
Knowledge 1: Gerhard VII, Duke of Jülich-Berg
Gerhard VII, Duke of Jülich-Berg (– 19 August 1475) was the son of William VIII of Jülich, Count of Ravensberg and Adelheid of Tecklenburg.Gerhard was the second duke of the combined Duchy of Jülich-Berg but the 7th Gerhard in the House of Jülich.Upon his father's death in 1428, Gerhard became Count of Ravensberg.In 1437, his uncle Adolf died without heirs and Gerhard inherited his title as Duke of Jülich-Berg.Gerhard continued his uncle's fight for the dukedom of Guelders, supported by King Albert II of Germany.In 1444 he won the Battle of Linnich but was unable to prevail in his fight for Guelders and ultimately sold his claim to Burgundy and acquired Blankenheim-Löwenberg and Heinsberg from Guelders.He was increasingly unable to govern his territories after 1461.His spouse Sophie of Saxe-Lauenburg then wielded regency for him. [SEP] Knowledge 2: William II, Duke of Jülich
William II, Duke of Jülich( – 13 December 1393) was the second Duke of Jülich and the sixth William in the House of Jülich.He was the second son of William I of Jülich and Joanna of Hainaut.William was co-ruler from 1343.He quarreled greatly with his father and imprisoned him from 1349- 1351.He tried for many years in Holland- Zeeland to enforce claims against the House of Wittelsbach but failed.When his father died in 1361, William became the second Duke of Jülich, his elder brother Gerhard having predeceased their father.He led the traditional feuds of the House of Jülich and lost Kaiserswerth and Zülpich, among others.William intervened in favor of Edward in the catastrophic war of succession between his brothers- in- law Reinald and Edward for control of the Duchy of Guelders.He took part in the 1371 Battle of Baesweiler( in which Edward was mortally wounded) and captured Wenceslaus I, Duke of Luxembourg.His brother- in- law Reinald died later in 1371 and as neither Reinald nor Edward left heirs, another fight for the succession of Guelders arose between William and his wife Maria( sister to Reinald and Edward) and Maria's sister Mathilde, wife of John II, Count of Blois.In 1377, Emperor Charles IV granted Guelders to William's son William, but the title was not secured until 1379.Among other territories, William acquired Monschau- Montjoie, Randerath and Linnich.

Answer: 9 September 1473