Ida of Avesnes

(1160-1178)

Parents

• Nicholas d'Oisy, Lord of Avesnes
• Matilda of la Roche

Children

• Ida de Saint Omer

Siblings

• James of Avesnes
• Béatrice de Walcourt

Partners

• William IV of Saint Omer
• Enguerrand, Count of Saint-Pol