John of Luxembourg, Count of Soissons
John of Luxembourg( died 22 June 1476) was Count of Marle and Count of Soissons between 1462 and 1476, Lord of Dunkirk, Gravelines and Bourbourg.
He was the eldest son of Louis de Luxembourg, Count of Saint- Pol and Jeanne de Bar, Countess of Marle and Soissons .< br>
When his mother died in 1462, he became Count of Marle and Soissons .< br>
John became a Knight in the Order of the Golden Fleece in 1473.< br>
When his father was beheaded for treason in 1475, John was n't able to inherit his lands, because they were confiscated.
John was killed one year later at the Battle of Morat.
He never married and his lands went to his younger brother Peter.
Peter II, Count of Saint-Pol
Peter II(" Pierre de Luxembourg"; – 25 October 1482) was Count of Saint- Pol, of Brienne, Marle, and Soissons.
In 1478, Peter was made a knight of the Order of the Golden Fleece.
He was the second eldest son of Louis de Luxembourg, Count of Saint- Pol, and Jeanne de Bar, Countess of Marle and Soissons, daughter of Robert of Bar, Count of Marle and Soissons and Jeanne de Béthune.
He married Margaret of Savoy, the eldest surviving daughter of Louis I, Duke of Savoy and Princess Anne of Cyprus, sometime after 29 January 1464.
Their five children included:
Anthony I, Count of Ligny
Anthony I, Count of Ligny( 1450 – 1519) was the youngest son of Louis de Luxembourg, Count of Saint- Pol and his wife, Jeanne de Bar, Countess of Marle and Soissons.
In 1482, he inherited the County of Brienne from his brother Peter II, Count of Saint- Pol.
After the death of Charles of Bourbon in 1510, Anthony inherited the County of Ligny, which thereby fell back to the House of Luxemburg.
Robert of Bar, Count of Marle
Robert of Bar (1390 – 25 October 1415) was Lord of Marle between 1397 and 1413, Count of Marle between 1413 and 1415 and Count of Soissons between 1412 and 1415.
He was the only child of Henry of Bar and Marie I de Coucy, Countess of Soissons.
His great-grandfather was Edward III.
Because his father was the eldest son of Robert I of Bar, Robert claimed the Duchy of Bar.
He only renounced his claims after a large financial compensation and the levation of Marle to a County.
In 1412 he also became Count of Soissons.<br
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Robert was one of the many French casualties at the Battle of Agincourt.
Robert married in 1409 Jeanne de Béthune, Viscountess of Meaux (d. 1450), daughter of Robert VIII de Béthune, Viscount of Meaux.
They had one child, a daughter:
John II of Luxembourg, Count of Ligny
John II of Luxembourg, Count of Ligny( 1392 – 5 January 1441) was a French nobleman and soldier, a younger son of John of Luxembourg, Lord of Beauvoir, and Marguerite of Enghien.
His older brother Peter received his mother's fiefs, including the County of Brienne, while John received Beaurevoir.
He married Jeanne de Béthune, Viscountess of Meaux, widow of Robert of Bar, on 23 November 1418, and became step- father to Jeanne de Bar, Countess of Marle and Soissons.
He and Jeanne de Béthune had no children.
Henry of Bar
Henry of Bar (c. 1362 – October 1397, in Treviso, Italy) was lord of Marle and the Marquis de Pont-à-Mousson.
He was the eldest son of Robert I of Bar and Marie of Valois.
Very early in his life, he was betrothed to Isabella of Lorraine, daughter of John I, Duke of Lorraine.
In 1374 he went to the court of his uncle King Charles V of France and was knighted at the coronation of king Charles VI of France, fighting in the Flanders campaign in 1383 and the Guelders campaign in 1388.
He then returned to Bar and governed it on behalf of his father, who was often immobilised by attacks of gout.
His betrothal was broken off and his fiancée instead married Enguerrand VII, Lord of Coucy (†1397).
In November 1384 Henry himself married Marie de Coucy, Countess of Soissons (1366–1405), daughter of Enguerrand VII Count of Soissons & Sire de Coucy, by his first wife Princess Isabella of England, eldest daughter of King Edward III.
Marie became Dame de Coucy et de Oisy following her father's death in 1397.
Henry had two children by Marie:
In 1396, Henry negotiated the neutrality of Gian Galeazzo Visconti, Duke of Milan, in dealings with the French protectorate in the republic of Gênes.
He then fought on the side of the Duke of Nevers in the crusade against the Ottoman Empire, being captured at the end of the Battle of Nicopolis on 25 September 1396.
He was taken prisoner and later ransomed, but died at the crusader's camp in Treviso after contracting the plague in Venice on his return trip.
Marie of Luxembourg, Countess of Vendôme
Marie of Luxembourg( died 1 April 1547) was a French princess, the elder daughter and principal heiress of Peter II of Luxembourg, Count of Saint- Pol and Soissons, and Margaret of Savoy, a daughter of Louis I, Duke of Savoy.
She belonged to the French, cadet branch of a dynasty which had reigned as Dukes of Luxembourg, and whose senior line provided several Holy Roman Emperors, before becoming extinct in 1437.
Her paternal grandparents were Louis of Luxembourg, Count of Saint- Pol and Brienne and Jeanne de Bar, Countess of Marle and Soissons.
Her maternal grandparents were Louis I, Duke of Savoy and Princess Anne of Cyprus.
Edward II, Count of Bar
Edward II of Bar( 1339 – May 1352) was Henry IV of Bar's eldest son and successor as count of Bar( with Edward's mother Yolande of Flanders ruling as count during his minority, which ended on 10 October 1349).
He had no male issue and was succeeded as count by his younger brother Robert I of Bar.
Jeanne of Bar, Countess of Marle and Soissons
Jeanne de Bar, suo jure Countess of Marle and Soissons, Dame d' Oisy, Viscountess of Meaux, and Countess of Saint- Pol, of Brienne, de Ligny, and Conversano( 1415 – 14 May 1462) was a noble French heiress and Sovereign Countess.
She was the only child of Robert of Bar, Count of Marle and Soissons, Sire d' Oisy, who was killed at the Battle of Agincourt when she was a baby, leaving her the sole heiress to his titles and estates.
In 1430, at the age of fifteen, Jeanne was one of the three women placed in charge of Joan of Arc when the latter was a prisoner in the castle of John II of Luxembourg, Count of Ligny, Jeanne's stepfather.
She was the first wife of Louis of Luxembourg, Count of Saint- Pol, of Brienne, de Ligny, and Conversano, Constable of France.
From their marriage descended Mary, Queen of Scots, King Henry IV of France and the subsequent Bourbon kings of France.
Henry IV, Count of Bar
Henry IV of Bar( abt 1315 – 1344) was count of Bar from 1336 to 1344.
His aunt, Joan of Bar, Countess of Surrey, governed Bar in his name during his minority.
He was the son of Edward I of Bar and his wife Marie of Burgundy.
He married Yolande of Dampierre( died 1395), a granddaughter of Robert III, Count of Flanders.
Henry and Yolande had two sons:

Question: Why did Robert Of Bar, Count Of Marle's father die?
Answer: plague