Walter V of Brienne was Duke of Athens from 1308 until his death. Being the only son of Hugh of Brienne and Isabella de la Roche, Walter was the heir to large estates in France, the Kingdom of Naples, and the Peloponnese. Wikipedia
Born: 1275, Brienne-le-Château, France
Died: March 15, 1311 (age 36 years), Greece
Grandchildren: Sohier, Count of Enghien, Margaret de Brienne, Jeanne de Brienne, and more
Parents: Hugh, Count of Brienne and Isabella de la Roche
Children: Walter VI, Count of Brienne and Isabella, Countess of Brienne
Spouse: Joanna of Châtillon (m. 1305)