William I, Count of Boulogne

Parents

• Matilda of Boulogne
• Stephen, King of England

Children

Siblings

• Eustace IV, Count of Boulogne
• Gervase of Blois
• Marie I, Countess of Boulogne
• Matilda de Blois
• Baldwin de Boulogne
• Almaric (?)
• William (?)
• Sybilla (?)
• Ralph (?)

Partners

• Isabel de Warenne, Countess of Surrey