Isabella was Queen of England from 1200 to 1216 as the second wife of King John, Countess of Angoulême in her own right from 1202 until her death in 1246, and Countess of La Marche from 1220 to 1246 as the wife of Count Hugh.
Ferdinand III, called the Saint, was King of Castile from 1217 and King of León from 1230 as well as King of Galicia from 1231. He was the son of Alfonso IX of León and Berenguela of Castile. Through his second marriage he was also Count of Aumale. Ferdinand III was one of the most successful kings of Castile, securing not only the permanent union of the crowns of Castile and León, but also masterminding the most expansive southward territorial expansion campaign yet in the Guadalquivir Valley, in which Islamic rule was in disarray in the wake of the decline of the Almohad presence in the Iberian Peninsula.
Blanche of Castile was Queen of France by marriage to Louis VIII. She acted as regent twice during the reign of her son, Louis IX: during his minority from 1226 until 1234, and during his absence from 1248 until 1252. She was born in Palencia, Spain, in 1188, the third daughter of Alfonso VIII, King of Castile, and Eleanor of England, sister of King Richard I of England and King John of England.
Joan of Acre was an English princess, a daughter of Edward I of England and Eleanor of Castile. The name "Acre" derives from her birthplace in the Holy Land while her parents were on a crusade.
The County of Aumale, later elevated to a duchy, was a medieval fief in Normandy. It was disputed between England and France during parts of the Hundred Years' War.
The County of Boulogne was a county within the Kingdom of France during the 9th to 15th centuries, centred on the city of Boulogne-sur-Mer. It was ruled by the counts of Flanders in the 10th century, but a separate House of Boulogne emerged during the 11th century. It was annexed by Philip II of France in 1212, after which it was treated as part of the county of Artois until it was finally annexed into the royal domain in 1550.
Eleanor of Castile was Queen of England as the first wife of Edward I, whom she married as part of a political deal to affirm English sovereignty over Gascony.
Mahaut or Matilda II of Boulogne was Countess of Boulogne in her own right and Queen of Portugal by marriage to King Afonso III from 1248 until their divorce in 1253. She was the daughter of Ida, Countess of Boulogne and her husband and co-ruler Renaud, Count of Dammartin. She succeeded her mother as Countess of Boulogne in 1216. She was the great-granddaughter of King Stephen of England.
The House of Plantagenet was a royal house which originated from the lands of Anjou in France. The family held the English throne from 1154 to 1485, when Richard III died in battle.
Adelaide of Normandy was the ruling Countess of Aumale in her own right in 1069-1087. She was the sister of William the Conqueror.
The County of Ponthieu, centered on the mouth of the Somme, became a member of the Norman group of vassal states when Count Guy submitted to William of Normandy after the battle of Mortemer. It eventually formed part of the dowry of Eleanor of Castile and passed to the English crown. Much fought-over in the Hundred Years' War, it eventually passed to the French royal domain, and the title Count of Ponthieu became a courtesy title for the royal family.
Marie of Ponthieu was suo jure Countess of Ponthieu and Countess of Montreuil, ruling from 1221 to 1250.
Simon of Dammartin was a son of Alberic III of Dammartin and his wife Mathildis of Clermont, heiress to the county of Clermont and daughter of Renaud II, Count of Clermont.
Blanche of Brittany (1271–1327) was a daughter of John II, Duke of Brittany, and his wife Beatrice of England. She is also known as Blanche de Dreux. Through her mother she was the granddaughter of King Henry III of England and Eleanor of Provence.
Jeanne de Ponthieu, dame d'Épernon, Countess of Vendôme and of Castres, better known in English as Joan of Ponthieu, was a French noblewoman, the youngest daughter of Jean II de Ponthieu, Count of Aumale. She was the wife of Jean VI de Vendôme, Count of Vendôme and of Castres. She acted as regent for her infant granddaughter Jeanne, suo jure Countess of Vendôme from 1371 until the child's premature death in 1372.
Philippe of Dammartin was a 13th-century noble woman. Philippe was the daughter of Simon of Dammartin, Count of Aumâle and his wife Marie of Ponthieu. She was the sister of Joan, Countess of Ponthieu, wife of Ferdinand III of Castile and mother of Eleanor of Castile, the wife of Edward I of England.
Alberic III of Dammartin was a French count and son of Alberic II, Count of Dammartin, and Clémence de Bar, daughter of Reginald I, Count of Bar.
The House of Clermont is a noble family of the French region of Picardy dating from the 10th century and included both the early counts of Clermont-en-Beauvaisis as well as many Constables of France. The house eventually merged with the House of Nesle with the marriage of Raoul II of Clermont and Gertrude of Nesle. The family is the sometimes referred to as the House of Clermont-Nesle.
Ferdinand of Castile, Infante of Castile, was the son of King Ferdinand III of Castile and Joan, Countess of Ponthieu.
