Matthew of Alsace

Count of Boulogne (1137–1173)

Parents

• Thierry of Lorraine, Count of Flanders
• Sibylla of Anjou

Children

• Ida, Countess of Boulogne
• Matilda of Flanders

Siblings

• Gertrude of Flanders, Countess of Savoy
• Peter of Flanders
• Laurette of Flanders
• Margaret I, Countess of Flanders
• Philip I, Count of Flanders
• Matilda de Flandre
• Baldwin de Flandre

Partners

• Marie I, Countess of Boulogne
• Eleanor, Countess of Vermandois