John I, Duke of Cleves
John I, Duke of Cleves, Count of Mark( 16 February 1419 – 5 September 1481) was Duke of Cleves and Count of Mark.
Elisabeth of Cleves, Countess of Schwarzburg-Blankenburg
Elisabeth of Cleves was the daughter of Adolph I, Duke of Cleves and Marie of Burgundy, Duchess of Cleves.
She married Count Henry XXVI of Schwarzburg- Blankenburg, on July 15, 1434.
Marie of Brittany, Countess of Saint-Pol
Marie of Brittany( 1268–1339) was the daughter of John II, Duke of Brittany, and Beatrice of England.
She is also known as Marie de Dreux.
John III, Duke of Brabant
John III( 1300 – 5 December 1355) was Duke of Brabant, Lothier, and Limburg( 1312 – 1355).
He was the son of John II, Duke of Brabant, and Margaret of England.
Elizabeth of Nevers
Elizabeth of Nevers (born: after 24 August 1439 in Nevers; died: 21 June 1483) was Duchess of Cleves from 1455 until her death, due to her marriage with John I of Cleves-Mark.
She was the matriarch of the house of Cleves-Nevers, and thus the Cleves line of the Counts and dukes of Nevers.
Because the territory was part of her inheritance, it fell to her son Engelbert after her death.
Engelbert, Count of Nevers
Engelbert of Cleves, Count of Nevers( 26 September 1462 – 21 November 1506) was the younger son of John I, Duke of Cleves and Elizabeth of Nevers, only surviving child of John II, Count of Nevers.
In 1481, he was sent with a large army to the Bishopric of Utrecht by his brother John II, Duke of Cleves where they successfully ousted David of Burgundy.
But after the Siege of Utrecht( 1483) he had to flee, and Utrecht returned to the control of Burgundy.
He married Charlotte of Bourbon- Vendôme, daughter of John VIII, Count of Vendôme, circa 1489.
Their son Engelbert became Count of Nevers and Eu in 1491 upon the death of his maternal grandfather John II, Count of Nevers.
His eldest brother John II( 1458 – 1521) inherited Cleves.
John II, Duke of Cleves
John II, "The Babymaker", Duke of Cleves, Count of Mark, (German: Johann II. "
der Kindermacher", Herzog von Kleve, Graf von Mark) (13 April 1458 – 15 March 1521) was a son of John I, Duke of Cleves and Elizabeth of Nevers.
He ruled Cleves from 1481 to his death in 1521.
He was called "The Babymaker" since he fathered sixty-three illegitimate children before his marriage with Mathilde of Hesse in 1490.
She was the daughter of Henry III, Landgrave of Upper Hesse and his wife Anna of Katzenelnbogen.
They had three children :
Mary of Burgundy, Duchess of Cleves
Mary of Burgundy, Duchess of Cleves( 1393 – 30 October 1466) was the second child of John the Fearless and Margaret of Bavaria, and an elder sister of Philip the Good.
Born in Dijon, she became the second wife of Adolph, Count of Mark in May 1406.
He was made the 1st Duke of Cleves in 1417.
They were the grandparents of King Louis XII of France and the great- grandparents of John III, Duke of Cleves, father of Anne of Cleves, who was fourth Queen consort of Henry VIII of England.
By their daughter, Catherine, they were ancestors of Mary, Queen of Scots.
The Duke and Duchess of Cleves lived at Wijnendale Castle in West Flanders.
She died in Cleves in present- day Monterberg, Kalkar.
Johann, Count of Cleves
Johann was last Count of Cleves, from 1347 through 1368.
Upon his death in 1368, the counties of Cleves and Count of Mark were united.
Johann was the youngest son of Dietrich VII, Count of Cleves and his second wife Margaret of Habsburg.
He succeeded in 1347 his brother Dietrich VIII, Count of Cleves who had died without sons.
He married Mechteld of Guelders( † 1384), daughter of Reginald II, Duke of Guelders, but the marriage remained childless.
After his death, the County of Cleves went to Adolf III of the Marck and so to the Counts of Marck.
Karl Harst
Karl Harst( fl. 1540) was a sixteenth- century diplomat from the German Duchy of Cleves.
He was the Duke of Cleves' representative in London during the marriage of Henry VIII of England and his fourth wife, Anne of Cleves.

Question: When did John Ii, Duke Of Cleves's mother die?
Answer: 21 June 1483