Mary of Lusignan, Countess of Brienne

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 husbands death while on Crusade in 1244. Marys 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.

Mary was born sometime before March 1215, the eldest daughter and child of King Hugh I of Cyprus and Alice of Champagne, the daughter of Queen Isabella I of Jerusalem and Henry II, Count of Champagne. She had a younger sister, Isabelle, and a brother, Henry, who succeeded as king upon the death of their father in January 1218. In 1225, Alice married secondly Bohemond V of Antioch, after she and her sister, Philippa had long become embroiled in a bitter dispute with Blanche of Navarre over the county of Champagne, which was later known as the Champagne War of Succession.

Source: Wikipedia