Notes from Jerry Gandolfo:

Edmund Plantagenet, Earl of Leicester: Acceded October 26, 1265. In 1253 he was invested by the Pope in the Kingdom of Sicily and Apulia, at about this time he was also made Earl of Chester. These were of little value as the real King of Sicily was still living and the Earldom of Chester was transferred to his elder brother Edward. He soon obtained, however, both possessions and dignities, for upon the forfeiture of Simon de Montfort by the King of the Earldom of Leicester and also the honor of the Stewardship of England and the lands of Nicolas de Segrave.

Blanche D' Artois, Queen of Navarre: Born: 1245 - 1250 in Arras, Pas-De-Calais, France
Died: May 2, 1300 or 1302 Paris, Seine, France Buried; Minoresses Conve, Aldgate, Middlesex, England
Father: Robert I, Count D'Artois, (Born about 1216 in ,Paris, Seine, France)
Mother: Mahaut (Maud) de Brabant, (born about 1244 in Troyes, Aube, France)
Married 1st: Henri I of Navarre, 1269, (born about 1244 in Troyes, Aube, France)
Children: Thibaut, (Teobaldo) Prince of Navarre; and Jeanne, Princess of Navarre
Married 2nd: Edmund "Crouchback" Price Plantagent, before October 1275 or 1276 at Paris, France

Sources: Hand-written notes from an unknown source passed down from Harold Ernest Montague Newman
Ancestry.com