On 14 Jun 1237 [her father] Robert Capet Count of Artois (age 20) and [her mother] Matilda Reginar Countess Saint Pol (age 13) were married. She the daughter of [her grandfather] Henry Reginar II Duke Brabant (age 30) and [her grandmother] Marie Swabia Duchess Brabant. He the son of [her grandfather] King Louis VIII of France and [her grandmother] Blanche Ivrea Queen Consort France (age 49). They were third cousins. He a great grandson of King Henry "Curtmantle" II of England. She a great x 2 granddaughter of King Stephen I England.

Around 1248 Blanche Capet Queen Navarre was born to Robert Capet Count of Artois (age 31) and Matilda Reginar Countess Saint Pol (age 24). She a great x 2 granddaughter of King Henry "Curtmantle" II of England.

On 16 Jan 1255 [her step-father] Guy Chatillon III Count Saint Pol (age 28) and [her mother] Matilda Reginar Countess Saint Pol (age 31) were married. She the daughter of [her grandfather] Henry Reginar II Duke Brabant and [her grandmother] Marie Swabia Duchess Brabant. They were fourth cousins. He a great x 4 grandson of King William "Conqueror" I of England. She a great x 2 granddaughter of King Stephen I England.

In 1269 Henry I King Navarre (age 25) and Blanche Capet Queen Navarre (age 21) were married. She the daughter of Robert Capet Count of Artois and Matilda Reginar Countess Saint Pol (age 45). He the son of Theobald IV King Navarre and Margaret Bourbon Queen Consort Navarre. They were half third cousins. He a great x 4 grandson of King William "Conqueror" I of England. She a great x 2 granddaughter of King Henry "Curtmantle" II of England.

On 08 Apr 1269 [her future husband] Edmund "Crouchback" Plantagenet 1st Earl of Leicester 1st Earl Lancaster (age 24) and Aveline Forz 6th Countess Albemarle and Lancaster were married. She by marriage Countess Lancaster. She the daughter of William Forz 4th Earl Albemarle and Isabella Redvers 8th Countess Devon and Albemarle (age 31). He the son of King Henry III of England (age 61) and [her future mother-in-law] Eleanor of Provence Queen Consort England (age 46). She a great x 5 granddaughter of King Henry I "Beauclerc" England.

On 04 or 05 Dec 1270 [her brother-in-law] Theobald "Young" II King Navarre (age 30) died at Trapani returning from the Eighth Crusade. His brother [her husband] Henry I King Navarre (age 26) succeeded I King Navarre, III Count Champagne. Blanche Capet Queen Navarre (age 22) by marriage Queen Navarre, Countess Champagne.

On 14 Jan 1273 [her daughter] Joan Blois I Queen Navarre was born to [her husband] Henry I King Navarre (age 29) and Blanche Capet Queen Navarre (age 25). She a great x 3 granddaughter of King Henry "Curtmantle" II of England.

On 22 Jul 1274 [her husband] Henry I King Navarre (age 30) died. His daughter [her daughter] Joan Blois I Queen Navarre (age 1) succeeded I Queen Navarre.

On 03 Feb 1276 Edmund "Crouchback" Plantagenet 1st Earl of Leicester 1st Earl Lancaster (age 31) and Blanche Capet Queen Navarre (age 28) were married. She by marriage Countess Lancaster. She the daughter of Robert Capet Count of Artois and Matilda Reginar Countess Saint Pol (age 52). He the son of King Henry III of England and Eleanor of Provence Queen Consort England (age 53). They were second cousin once removed. She a great x 2 granddaughter of King Henry "Curtmantle" II of England.

Around 1278 [her son] Thomas Plantagenet 2nd Earl of Leicester, 2nd Earl Lancaster, Earl of Salisbury and Lincoln was born to [her husband] Edmund "Crouchback" Plantagenet 1st Earl of Leicester 1st Earl Lancaster (age 32) and Blanche Capet Queen Navarre (age 30). He a grandson of King Henry III of England.

Around 1281 [her son] Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster was born to [her husband] Edmund "Crouchback" Plantagenet 1st Earl of Leicester 1st Earl Lancaster (age 35) and Blanche Capet Queen Navarre (age 33). He a grandson of King Henry III of England.

In 1283 Roger Mowbray 1st Baron Mowbray (age 26) was created 1st Baron Mowbray by [her brother-in-law] King Edward I of England (age 43).

On 16 Aug 1284 [her son-in-law] Philip IV King France (age 16) and [her daughter] Joan Blois I Queen Navarre (age 11) were married. She by marriage Queen Consort of France. She the daughter of [her former husband] Henry I King Navarre and Blanche Capet Queen Navarre (age 36). He the son of King Philip III of France (age 39) and Isabella Barcelona Queen Consort France. They were second cousins. He a great x 3 grandson of King Henry "Curtmantle" II of England. She a great x 3 granddaughter of King Henry "Curtmantle" II of England.

On 29 Sep 1288 [her mother] Matilda Reginar Countess Saint Pol (age 64) died.

On 30 Dec 1292 [her son] Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster (age 11) and [her daughter-in-law] Maud Chaworth (age 10) were married. He the son of [her husband] Edmund "Crouchback" Plantagenet 1st Earl of Leicester 1st Earl Lancaster (age 47) and Blanche Capet Queen Navarre (age 44). He a grandson of King Henry III of England.

In 1294 [her son] Thomas Plantagenet 2nd Earl of Leicester, 2nd Earl Lancaster, Earl of Salisbury and Lincoln (age 16) and [her daughter-in-law] Alice Lacy Countess Leicester, and Lancaster 5th Countess of Salisbury 5th Countess Lincoln (age 12) were married. She the daughter of Henry Lacy 4th Earl Lincoln, Earl Salisbury (age 43) and Margaret Longespée 4th Countess of Salisbury and Lincoln. He the son of [her husband] Edmund "Crouchback" Plantagenet 1st Earl of Leicester 1st Earl Lancaster (age 48) and Blanche Capet Queen Navarre (age 46). They were third cousin once removed. He a grandson of King Henry III of England. She a great x 3 granddaughter of King Henry "Curtmantle" II of England.

On 05 Jun 1296 [her husband] Edmund "Crouchback" Plantagenet 1st Earl of Leicester 1st Earl Lancaster (age 51) died at Bayonne [Map]. He was buried at Westminster Abbey [Map]. His son [her son] Thomas Plantagenet 2nd Earl of Leicester, 2nd Earl Lancaster, Earl of Salisbury and Lincoln (age 18) succeeded 2nd Earl of Leicester, 2nd Earl Lancaster. [her daughter-in-law] Alice Lacy Countess Leicester, and Lancaster 5th Countess of Salisbury 5th Countess Lincoln (age 14) by marriage Countess of Leicester, Countess Lancaster.

On 02 May 1302 Blanche Capet Queen Navarre (age 54) died.