Walter III of Brienne
Walter III of Brienne (French: Gautier, c. 1166–1205), eldest son of Count Erard II, succeeded as count of Brienne in Champagne in 1191. In 1200 he married Elvira, daughter of the deposed Sicilian king Tancred, and prepared an army to press her claim to Sicily.
Having taken the cross for the Fourth Crusade, he recruited crusaders for his Italian campaign. Pope Innocent III refused Elvira's claim to the throne but recognised the couple's rights to Taranto and Lecce; Walter won battles at Capua and Cannae in 1201.
In June 1205 he was stabbed in his camp at Terracina and died of his wounds. His posthumous son was Walter IV.