Jean II de France, dit Jean le Bon, (né le 26 avril 1319 au château du Gué de Maulny près du Mans - mort à Londres le 8 avril 1364), fils du roi Philippe VI et de son épouse Jeanne de Bourgogne, fut roi de France de 1350 à 1364, second souverain issu de la maison capétienne de Valois.
Il est sacré roi de France le 26 septembre 1350. 
Jean de Valois naît au château de Gué-de-Maulny près du Mans, le 26 avril 1319. Il est le fils de Philippe de Valois, le cousin du roi Charles IV le Bel, et de sa première femme, Jeanne de Bourgogne. 
Jean II meurt à l'hôtel de Savoie, à Londres, le 8 avril 1364. Son corps est restitué à la France et il est inhumé dans la basilique Saint-Denis. Sa sépulture, comme celle de tous les autres princes et dignitaires reposant en ce lieu, fut profanée par les révolutionnaires en octobre 1793.
Jean le Bon est marié, à l'âge de treize ans, à Bonne de Luxembourg le dimanche 26 juillet 1332 à Melun. Ils ont onze enfants : 
En pleine épidémie de peste noire, son épouse Bonne de Luxembourg trouve la mort le 3 ou le 11 septembre 1349 à l'abbaye de Maubuisson.
Le 9 février 1350, Jean le Bon se remarie au château royal de Sainte-Gemme à Feucherolles avec Jeanne d'Auvergne (1326-1361), fille de Guillaume XII comte d'Auvergne, veuve de Philippe de Bourgogne. *Avec Jeanne, il a :
Louis (Duke of Anjou and Touraine, Count of Maine)Child of Jean and his wife Bonne.  Louis (1339-1384) duc d'Anjou épouse Marie de Blois-Châtillon (1345-1404), et descendance ; 
Jean (Duke of Berry and Auvergne, Count of Poitou) Child of Jean and his wife Bonne.  Jean (1340-1416) duc de Berry épouse en 1360 Jeanne d'Armagnac (?-1387), et descendance ; 
Philippe (Duke of Touraine, Duke of Burgundy)Child of Jean and his wife Bonne.  Philippe le Hardi (1342-1404) duc de Bourgogne épouse en 1369 Marguerite III de Flandre (1350-1405), et descendance ; 
Jeanne. Child of Jean and his wife Bonne.  Jeanne (1343-1373) épouse en 1352 Charles le Mauvais, roi de Navarre (1332-1387), et descendance ; 
Marie (wife of Robert I, Duke of Bar, Marquis of Pont-a-Mousson eigneur of Casel). Child of Jean and his wife Bonne.  Marie (1344-1404) épouse Robert Ier (1344-1411), duc de Bar, et descendance ; 
Agnes. Child of Jean and his wife Bonne.  Agnès de Valois (1345-1349), sans postérité ; 
Marguerite. Child of Jean and his wife Bonne.  Marguerite (1347-1352), sans postérité ; 
Isabelle (wife of Gian Galeazzo Visconti, Duke of Milan). Child of Jean and his wife Bonne.  Isabelle (1348-1372) épouse Jean-Galéas Visconti (1351-1402) duc de Milan, trois enfants dont Valentine Visconti, et postérité. 
Blanche. Child of Jean and his second wife Jeanne.  Blanche (1350-1350), sans postérité ; 
Catherine. Child of Jean and his second wife Jeanne.  Catherine (1352-1352), sans postérité ; 
Son. Child of Jean and his second wife Jeanne.  un fils (1354-1354), sans postérité. 
The English chronicler Thomas de Walsingham attributes to him "without proof", a natural son:
He married Bonne (or Jutta) of Luxembourg, daughter of jean of Luxembourg, King of Bohemia, by Elizabeth, daughter of Wenceslas II, King of Bohemia and Poland. She was born at Prague, Bohemia, 20 May 1315.
Jean and Bonne had 10 children including four sons.
His wife Bonne de Luxembourg died between the 3rd and 11th September, 1349 during the Black Death epidemic. 
Bonne died at Maubuisson Abbey 11 Sep 1349 and was buried at Maubuison Abbey.
1350 Second Marriage to Jeanne of Boulougne
Jean married secondly at Sainte-Gemme, Feucherolles (Yvelines) 9 Feb 1350 Jeanne of Boulogne, suo jure Countess of Auvergne and Boulogne, widow of Philippe of Burgundy, Count of Nevers, who died 22 Sep 1347. She was daughter and heiresof Guillaume XII, Count of Auvergne and Boulogne, by Marguerite, daughter of Louis, Count of Evreux. She was born 8 May 1326. 
They had three children, including two daughters. 
Jeanne died at Vadans (Haute-Saone) 29 Sept 1360.
On the death of his father, King Philippe VI in 1350, Jean succeeded as king. He was crowned King of France at Reims 26 Sept 1350. 
1356 Battle of Poitiers
Captured by the English at the Battle of Poitiers on Sept. 19, 1356, he was forced to sign the disastrous treaties of 1360 during the first phase of the Hundred Years' War (1337-1453) between France and England. 
After becoming king on Aug. 22, 1350, John continued a truce with the English until later that year, when he had an English hostage, Raoul de Brienne, comte d'Eu, former constable of France, executed. 
By March 1351 King Edward III of England realized the impossibility of remaining at peace; but John committed the first act of hostility by attacking and recapturing Saint-Jean-d'Angély in western France that September 7. John signed a new truce with England on Sept. 12, 1351, but broke it by supporting the partisans of Charles of Blois (a pretender to Brittany, then held prisoner by Edward) in August 1352; the peace, however, was extended until September 23. 
John's other bitter enemy was Charles II the Bad, king of Navarre, to whom John gave his daughter Joan as an offer of alliance; the enmity still remained strong, however, because John never paid a dowry or recognized a rent of 15,000 livres due to Charles. John further irritated Charles by giving the new constable of France, Charles de La Cerda, lands that were claimed by Charles of Navarre. In revenge, the latter had the new constable assassinated; but in spite of John's rage, the two kings made a superficial peace in February 1354. Charles desired an alliance with Edward, which so frightened John that he made another peace with Charles on Sept. 10, 1355. On April 16, 1356, at Rouen, John took his revenge on Charles by having him imprisoned. 
Meanwhile Edward, displeased by the 1355 alliance between John and Charles, invaded France later that year but then returned to England before any confrontations. At the same time, Edward's son Edward, prince of Wales (later called the Black Prince), attacked southern France. Unable to halt the English invasions because he lacked funds, John gathered the States General to seek money and to impose an unpopular salt tax. John first went to defend Paris and Chartres. He and the Prince of Wales finally met near Poitiers in September 1356. The French army was decimated, and John was taken prisoner, leaving the French people grief-stricken and confused. 
1357 Prisoner in London
John was taken to London in April 1357, where he was lodged in the Savoy palace; there he concluded treaties (January 1358 and March 1359) so harsh that they were repudiated in France. Finally the treaties of Brétigny and of Calais (May and October 1360) fixed John's ransom at 3,000,000 gold écus and surrendered most of southwestern France to Edward. On Oct. 9, 1360, John was released to raise a ransom that France could not afford to pay, and hostages were accepted in his place. When one of the hostages (John's own son) escaped, John, feeling dishonoured, returned to England on his own volition as a prisoner. 
Jean II, King of France, died at Savoy Hotel in London, 8 April 1364. He and his second wife, Jeanne, were buried in the Abbey of Saint-Denis.
Basilique de Saint-Denis, Seine-Saint-Denis, Île-de-France, France
Because Carl, for one thing none of the sources we've seen directly quotes Thomas de Walsingham's contribution. Wikipedia quotes Patrick van Kerrebrouck. Charles Cawley quotes Père Anselme who quotes Walsingham. So it's not straight from the source. We don't know what Walsingham exactly says. What we know is that Kerrebrouck, Anselme and Cawley all call this natural son John, not Walter. Anselme, followed by Cawley, attribute the son to Philippe VI, not Jean II, and say he took part in a duel in 1350. And to paraphrase - Cawley and Anselme should not be lightly dismissed without reason.