On 14 Jun 1237 [his father] Robert Capet Count of Artois (age 20) and [his mother] Matilda Reginar Countess Saint Pol (age 13) were married. She the daughter of Henry Reginar II Duke Brabant (age 30) and Marie Swabia Duchess Brabant. He the son of Louis "Lion" VIII King France and 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 4 granddaughter of King William "Conqueror" I of England.

In 1248 John Burgundy Count Charolais (age 17) and [his future wife] Agnes Dampierre Countess Artois and Charolais (age 11) were married. She by marriage Countess Charolais. He the son of Hugh IV Duke Burgundy (age 34) and Yolande Capet Duchess Burgundy (age 36). He a great x 5 grandson of King William "Conqueror" I of England.

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

In 1262 Robert Artois II Count Artois (age 11) and Amice Countenay Countess Artois were married at Paris [Map]. She by marriage Countess Artois. He the son of Robert Capet Count of Artois and Matilda Reginar Countess Saint Pol (age 38). They were third cousin once removed. He a great x 2 grandson of King Henry "Curtmantle" II of England. She a great x 4 granddaughter of King Henry I "Beauclerc" England.

In 1277 Robert Artois II Count Artois (age 26) and Agnes Dampierre Countess Artois and Charolais (age 40) were married. She by marriage Countess Artois. He the son of Robert Capet Count of Artois and Matilda Reginar Countess Saint Pol (age 53). He a great x 2 grandson of King Henry "Curtmantle" II of England.

In 1285 [his son-in-law] Otto Ivrea IV Count Burgundy (age 37) and [his daughter] Mahaut Artois Countess Burgundy (age 17) were married. She by marriage Countess Burgundy. The difference in their ages was 20 years. She the daughter of Robert Artois II Count Artois (age 34) and Amice Countenay Countess Artois. He the son of Hugh Ivrea Count Burgundy and Adelaide Andechs. They were half fourth cousins. He a great x 5 grandson of King William "Conqueror" I of England. She a great x 3 granddaughter of King Henry "Curtmantle" II of England.

On 18 Oct 1298 Robert Artois II Count Artois (age 48) and Margaret Hainault Countess Artois were married. She by marriage Countess Artois. She the daughter of John Hainault II Count Hainault II Count Holland (age 51) and Philippa Luxemburg Countess Hainault and Holland (age 46). He the son of Robert Capet Count of Artois and Matilda Reginar Countess Saint Pol. They were second cousin once removed. He a great x 2 grandson of King Henry "Curtmantle" II of England.

Raoul Nesle and Isabelle Hainault were married. She the daughter of John Hainault II Count Hainault II Count Holland and Philippa Luxemburg Countess Hainault and Holland. He the son of John Nesle III Count Soissons and Margaret Montfort Countess Soissons. They were half third cousin once removed. He a great x 4 grandson of King Henry I "Beauclerc" England.

[his son] Philip Artois and Blanche Capet were married. She the daughter of John Capet II Duke Brittany and Beatrice Plantagenet. He the son of Robert Artois II Count Artois and Amice Countenay Countess Artois. They were third cousin once removed. He a great x 3 grandson of King Henry "Curtmantle" II of England. She a granddaughter of King Henry III of England.