Question: Who is John Ii Of Luxembourg, Count Of Ligny's paternal grandfather?

Knowledge 1: 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. [SEP] Knowledge 2: John of Luxembourg, Lord of Beauvoir
John of Luxembourg ("Jean de Luxembourg")(– bef.2 July 1397, Italy), was Lord of Beauvoir (or Beaurevoir) and Richebourg, and also (as "John II")Count of Brienne and Conversano .He was a son of Guy I of Luxembourg, Count of Ligny and Mahaut de Châtillon (1335–1378), Countess of Saint-Pol.John married around 1387 with Margaret, Countess of Brienne, daughter of Louis of Enghien, heiress of the counties of Brienne and of Conversano, and the Lordship of Enghien.They had five children:
Knowledge 1: 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. [SEP] Knowledge 2: Jeanne de Béthune, Viscountess of Meaux
Jeanne de Béthune, Viscountess of Meaux, Countess of Ligny( c.1397- late 1450), was a French noblewoman, the suo jure Viscountess of Meaux, having inherited the title upon her father's death in 1408.Her father was Robert VIII de Béthune, Viscount of Meaux.Jeanne married twice; firstly to Robert of Bar, and secondly John II of Luxembourg, Count of Ligny who held Joan of Arc prisoner following her capture by the Burgundians in May 1430.Jeanne was one of the three women who cared for Joan during her imprisonment.
Knowledge 1: 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. [SEP] Knowledge 2: 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.

Answer: Guy I of Luxembourg, Count of Ligny