Marie, Countess of Eu

Marie of Lusignan or Marie I de Lusignan (born c. 1223 in Melle; died in Poitou, 1 October 1260; buried at the Abbey of Foucarmont), was the only child of Raoul II of Lusignan and his second wife, Yolande de Dreux. She became Dame d'Issoudun, Countess of Eu and of Guines in 1250.
She was married around 1249 to Alphonso of Brienne. Alphonse was Count of Eu by marriage.
Marie and Alphonso had at least two children: