Érard de Brienne was a French nobleman. He was lord of Ramerupt

Ramerupt

Ramerupt is a commune in the Aube department in north-central France.-Population:-Personalities:*Rashbam, medieval rabbi and scriptural commentator*Rabbeinu Tam, medieval rabbi...

 and of Venizy

Venizy

Venizy is a commune in the Yonne department in Burgundy in north-central France....

, and also a pretender

Pretender

A pretender is one who claims entitlement to an unavailable position of honour or rank. Most often it refers to a former monarch, or descendant thereof, whose throne is occupied or claimed by a rival, or has been abolished....

 to the county of Champagne as an instigator of the Champagne War of Succession. He was a son of André of Brienne

André of Brienne

André de Brienne , lord of Ramerupt, was a French nobleman of the Third Crusade.-Life:He arrived in the Holy Land on 28 August 1189 to participate in the Siege of Acre with the first French troops, which he led alongside James of Avesnes, Henry I of Barres and Philip of Dreux...

 and of Alix of Vénizy.

Marriage and issue

Erad married Philippa of Champagne

Philippa of Champagne

Philippa of Champagne, Lady of Ramerupt and of Venizy was the third daughter of Queen Isabella I of Jerusalem and Henry II, Count of Champagne. She was the wife of Erard de Brienne-Ramerupt who encouraged her in 1216 to claim the county of Champagne which belonged to her cousin Theobald IV, who...

, they had the following children:

• Henri de Brienne (killed in battle at Mansurah 8 February 1250), Seigneur of Ramerupt and de Vénisy, married Marguerite de Salins by whom he had two sons.
• Erard de Brienne (killed in battle, February 1250), married Mathilde by whom he had one daughter.
• Marie de Brienne (1215- c.1251), married firstly Gaucher, Sire de Nanteuil-la Fosse, by whom she had three children; she married secondly Hughes II, Sire de Conflans, by whom she had one son.
• Marguerite de Brienne (died 1275), married Dirk Van Beveren, Burggraf of Dixmuiden, by whom she had issue. She became a nun after her husband's death.
• Heloise de Brienne
• Isabeau de Brienne (died 1274/1277), married firstly Henri V, Count of Grandpré, by whom she had three children; she married secondly Jean de Picquigny, by whom she had one daughter. Isabeau was the ancestress of Louis I, Count of Flanders.
• Jeanne de Brienne, Dame de Séans-en-Othe, married before 1250 Mathieu III, Sire de Montmorency, by whom she had five children.
• Sibylle de Brienne, Abbess of Ramerupt
• Alix de Brienne

Philippa died on 20 December 1250, a little more than six years after her husband. She was aged about fifty-three.