John I of Brienne, Count of Eu
French count
(1250–1294)
Parents
Marie of Lusignan, Countess of Eu
Alphonso of Brienne
Children
John II of Brienne, Count of Eu
Jeanne de Brienne
Maud de Brienne
Isabeau de Brienne
Margaret d'Eu
Margaret de Brienne
Siblings
Hugh, Count of Brienne
Blanche d'Eu
Raoul d'Eu
Margaret d'Eu
Isabeau de Brienne
Partners
Béatrice de Châtillon