John II, called Jean de L'Aigle (died 1454), was Count of Penthièvre from 1433 until his death. He was also Count of Périgord from 1437.

John was the second son of John I, Count of Penthièvre, and his wife, Margaret de Clisson, and was granted the lordship of L'Aigle in Normandy upon his father’s death in 1404. When his brothers kidnapped John V, Duke of Brittany, in 1420, John de L'Aigle negotiated for the duke's release on the condition that his youngest brother, William, be released from captivity. The duke agreed, but then refused to cooperate, claiming his agreement was made in a state of duress. William remained in captivity until 1448.^[1]

Following the death of his brother Olivier in 1433, John succeeded to his family's hereditary titles in Brittany, including the family's claim to the Breton ducal throne. In 1437, he also purchased the county of Périgord from Charles, Duke of Orléans. He only entered into possession of his Breton lands in 1448 after reconciling with Francis I, Duke of Brittany.^[2] During the final campaigns of the Hundred Years’ War, he served as lieutenant general for Charles VII of France in Aquitaine between 1450 and 1451 and he distinguished himself at the Battle of Castillon in 1453.^[3]

John married Margaret de Chauvigny, lady of Saint-Chartier, but died without issue in 1454.^[3] In his will, he designated his niece and heir general, Nicole, to succeed him in Penthièvre, while his brother William, Viscount of Limoges, succeeded him in Périgord.

• Bourdeaut, Arthur (1913). "Jean V et Marguerite de Clisson. La ruine de Châteauceaux". Bulletin de la société archéologique et historique de Nantes et de Loire-Inférieure. 54: 331–417. Retrieved 28 November 2018.
• De Guibours, Anselme (1726–1733). Histoire généalogique et chronologique de la maison royale de France, des pairs, grands officiers de la Couronne, de la Maison du Roy et des anciens barons du royaume. Vol. 6. Paris. pp. 104–105. Retrieved 24 November 2018.
• Duchesne, André (1621). Histoire de la Maison de Chastillon sur Marne avec les genealogies et armes des illustres Familles de France & des Pays-bas, lesquelles y ont esté alliées. Paris: Sabastien Cramoisy. p. 141. Retrieved 24 November 2018.
• Juvénal des Ursins, Jean (1836). Histoire de Charles VI, Roy de France, et des choses mémorables advenues durant quarante-deux années de son règne, depuis 1380 jusques a 1422. Paris: Michaud & Poujoulat. Retrieved 28 November 2018.