Mary of Eu

Mary I of Lusignan (c. 1223 – October 1, 1260) was a Countess of Eu in France. She was a daughter of Raoul II of Lusignan, Count of Eu. Her mother was Yolande de Dreux, daughter of Robert II, Count of Dreux and Yolande de Coucy.
Mary married Alphonso of Brienne about 1250. She became Dame d'Issoudun, Countess of Eu and of Guinness in 1250. Mary died on October 1, 1260 in Melle.
Family.
She and Alphonso had two children:
Marie’s possible children: