28 - 30 June 1347. He was succeeded as earl by his nephew Richard Fitzalan, who was also earl of Arundel. Family On 15 March 1305, King Edward I of England offered John the marriage of his granddaughter Joan of Bar, Countess of Surrey, which he "willingly accepted." She was a daughter of count Henry III of Bar, and Eleanor of England, Countess of Bar, the eldest daughter of king Edward I of England. John's father was a first cousin of Edward I of England which meant that himself and his bride to be were second cousins once removed. They were both descended from Isabella of Angoulême. A dispensation was granted from Pope Clement V in order for the marriage to take place, due to them being related within the fourth degree of kindred. They were married on 25 May 1306, in the royal chapel of Westminster Palace."Chapter Seventeen: A Disastrous Marriage and the End of a Dynasty". Connolly, S.B. (2021). Defenders of the Norman Crown: Rise and Fall of the Warenne Earls of Surrey. Barnsley: Pen & Sword History. p.207. Retrieved 08 July 2021. Joan (or Jeanne) was only around 10 years old at the time of the marriage. After marriage, the couple lived in Yorkshire on John's estates. Sometimes they lived at Sandal Castle, while the rest of the time they lived at Conisbrough Castle. There were soon indicators that this marriage may not be a happy one, when in 1309 king Edward II of England granted leave for John to make any person he wished heir to the lands that he held. But he requested surety that any heir which he may have by his wife Joan was not to be disinherited. John and his wife did not have any children. He tried on several occasions to divorce Joan but was not successful. Warenne had a relationship with Maud de Nerford, with whom he had several illegitimate children, one of whom included Sir Edward de Warren.Fairbank, F.R (1907)."The Last Earl of Warenne And Surrey, And The Distribution of His Possessions". In The Yorkshire Archaeological Journal vol.XIX. p.248. Retrieved 27 June 2022. He was living openly with Maud by 1311. In 1313 the King arranged for his yeoman William Aune to take Joan from Conisbrough Castle, and bring her to him. Edward II of England then paid all Joan's expenses while she lodged at the Tower of London.