Career
Walter married Echiva de Bures, Princess of Galilee and Tiberias, daughter of Prince Godfrey de Bures. From this marriage they had four sons:
Hugh II of Saint Omer, Prince of Galilee and Tiberias from 1187 to 1204, who married Margaret of Ibelin, daughter of Balian of Ibelin
William of Saint Omer, who married Marie, daughter of Raymond II, Count of Tripoli, widow of Baldwin of Ibelin
Raoul of Saint Omer, Prince of Galilee from 1204 to 1219, who married Agnès Garnier, daughter of Reginald of Sidon
Odo of Saint Omer, also known as Oste de Saint-Omer, 1180 to 1217, count of Tripoli, Lord of Gogulat, who married Fenie (Euphémie) Garnier, daughter of Renaud de Grenier, Count of Sidon.