Question: Who is the paternal grandmother of Jeanne Of Bar, Countess Of Marle And Soissons?

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

Answer: Marie I de Coucy, Countess of Soissons