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Marie of Brienne was Latin Empress as the wife of Baldwin II of Courtenay. She served as regent during the absence of Baldwin II twice: in 1237–1239, and in 1243–1257.
Erard II of Brienne was count of Brienne from 1161 to 1191, and a French general during the Third Crusade, most notably at the Siege of Acre. He was the son of Gautier II, count of Brienne, and Humbeline Baudemont, daughter of Andrew, lord of Baudemont and Agnes of Braine. His paternal grandparents were Erard I, Count of Brienne and Alix de Roucy. During this siege he saw his brother André of Brienne die on 4 October 1189, before being killed himself on 8 February 1191. Erard II's nephew was Erard of Brienne-Ramerupt.
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Philippa of Champagne was the third daughter of Queen Isabella I of Jerusalem and Count Henry II 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 was still a minor. This provoked the conflict with Theobald's mother, the Regent, Blanche of Navarre, which erupted into open warfare, and came to be known as the Champagne War of Succession. Blanche's son Theobald, who had the support of King Philip II of France, Frederick II, Holy Roman Emperor, and Eudes III of Burgundy, eventually emerged the victor. Philippa renounced her claim in April 1222, but Theobald was constrained to pay Erard and Philippa a large monetary settlement for his rights to the county.
Mary of Lusignan, was the wife of Count Walter IV of Brienne and Countess of Brienne from the time of her marriage in 1233 to her husband's death while on Crusade in 1244. Mary's parents were King Hugh I of Cyprus and Alice of Champagne, making her a maternal granddaughter of Queen Isabella I of Jerusalem. Her two surviving sons were John, Count of Brienne, and Hugh of Brienne.
Geoffrey VI (Geoffroy VI) (died 6 February 1250) was a Viscount of Châteaudun. He was the son of Geoffrey V, Viscount of Châteaudun, and Adelicia de Nevers. Although Adelicia's ancestry is not precisely known, she is likely the daughter of William IV, Count of Nevers, and Eléonore, Countess of Vermandois.
Louis of Brienne, also known as Louis of Acre, was viscount of Beaumont-sur-Sarthe in Maine, France.
References
- Perry, Guy (2013). John of Brienne: King of Jerusalem, Emperor of Constantinople, c. 1175–1237. Cambridge University Press. ISBN 978-1-107-04310-7.
- Perry, Guy (2018). The Briennes: The Rise and Fall of a Champenois Dynasty in the Age of the Crusades, C. 950–1356. Cambridge University Press.
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