Margaret of Burgundy, Duchess of Bavaria
Margaret of Burgundy (October 1374 – 8 March 1441) was Duchess of Bavaria as the wife of Duke William II.
Margaret was the third child and first daughter out of nine children born to Philip II, Duke of Burgundy, and Margaret III, Countess of Flanders.
Margaret's father used the marriages of his children to achieve far-sighted goals.
In keeping with this strategy, Margaret and her brother John were wedded in a double marriage to William of Bavaria and his sister Margaret.
This marriage, celebrated on 12 April 1385 in Cambrai, would later influence the union of Hainaut and Holland with Burgundy and Flanders, as carried out by Margaret's nephew Philip the Good.
Margaret exerted a lot of political influence during the reign of her spouse: William ruled both Holland and Hainaut, but preferred Holland and spent a lot of his reign there.
Margaret thus governed Hainaut in his name.
After 16 years of childless marriage, Margaret gave birth to a daughter, Jacqueline, on 16 August 1401.
Margaret's political position increased in the 1410s, as she was granted several towns and castles as her personal fiefs.
William died in 1417 from an infection which developed after he was bitten by a dog.
Although he and Margaret attempted to ensure that their daughter would inherit all his lands, a war of succession broke out after his death.
Jacqueline would eventually come to inherit Hainaut, Holland, and Zeeland, but not Bavaria.
During the reign of her daughter, Margaret was involved in several political acts.
She preferred the Le Quesnoy castle as her residence, which was also her personal fief.
She died at Le Quesnoy on 8 March 1441, having outlived her childless daughter.
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.
Anne of Burgundy
Anne of Burgundy, Duchess of Bedford( 30 September 1404 – 13 November 1432) was a daughter of John the Fearless, Duke of Burgundy( 1371 – 1419) and his wife Margaret of Bavaria( 1363 – 1423).
Agnes of France, Duchess of Burgundy
Agnes of France( c. 1260 – 19 December 1327) was a Duchess of Burgundy by marriage to Robert II, Duke of Burgundy.
She served as regent of Burgundy during the minority of her son in 1306 – 1311.
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.
Sibylla of Burgundy, Duchess of Burgundy
Sybilla of Burgundy( 1065 – 1103), was a French noble, Duchess consort of Burgundy by marriage to Eudes I, Duke of Burgundy.
She was a daughter of William I, Count of Burgundy and Stephanie.
She was married to Eudes I, Duke of Burgundy in 1080.
Children:
Henry, son of Robert I of Burgundy
Henry of Burgundy (c. 1035 – January 27, 1070/1074), called the Gallant ("le Damoiseau"), was the eldest surviving son and heir of Robert I, Duke of Burgundy, second son of Robert II of France, and his wife, Helie of Semur, granddaughter of Henry I, Duke of Burgundy.
Little is known about his life.
He died shortly before his father and was never duke himself.
The name of Henry's wife is not known, though both Sibylla and Clémence have been suggested.
The first of these derives from an undated obituary from Besançon, Sainte-Etienne, naming "Sibilla, mater ducus Burgundie" (Sibylla, mother of the Duke of Burgundy), it being reasoned that since she is not called duchess, she must have been married to the sole father of a duke who was not a duke himself, Henry.
However, it has been argued by Jean Richard that this is a reference to Sibylla of Burgundy, Duchess of Burgundy, mother of the then-ruling duke, Hugh II.
Richard proposed based on the name's repeated use among the descendants of her son Odo I, Duke of Burgundy that she may have been named Clémence, although Odo's wife had a sister, Clementia of Burgundy, who could have been the inspiration for its use among their descendants.
Based on the use of the byname "Borel" by Odo I, genealogist Szabolcs de Vajay proposed that his mother was the daughter of Berenguer Ramon I, Count of Barcelona and his third wife, Guisle of Lluca, and hence granddaughter of Ramon Borrell, Count of Barcelona, although there is no documentary evidence that this was the case.
Henry's wife died on or after July 6, 1074.
Margaret III, Countess of Flanders
Margaret III (13 April 1350 – 16/21 March 1405) was the last Countess of Flanders of the House of Dampierre, as well as Countess of Artois and Countess of Burgundy (as Margaret II).
She was the only surviving child and heir of Louis II, Count of Flanders (1346–1384) and Margaret of Brabant.
Agnes of Burgundy, Duchess of Bourbon
Agnes of Burgundy( 1407 – 1 December 1476), duchess of Bourbon( Bourbonnais) and Auvergne, countess of Clermont, was the daughter of John the Fearless( 1371 – 1419) and Margaret of Bavaria.
Her maternal grandparents were Albert I, Duke of Bavaria and Margaret of Brieg.
Her paternal grandparents were Philip the Bold and Margaret III, Countess of Flanders.
Joan III, Countess of Burgundy
Joan III of Burgundy( 1/2 May 1308 – 10/15 August 1347), also known as Joan of France was a reigning Countess of Burgundy and Artois in 1330 – 1349, She was also Duchess of Burgundy by marriage to Odo IV, Duke of Burgundy.
She was the eldest daughter of King Philip V of France and Countess Joan II of Burgundy.

Question: Who is the maternal grandfather of Margaret Of Burgundy, Duchess Of Bavaria?
Answer: Louis II, Count of Flanders