Guillaume de Saint-Omer

• 
• Born in 1151
• Deceased in 1192, at the approximate age of 40 years

Parents

• Guillaume de Saint-Omer
• Mathilde de Brienne

Family

• Married on June 6, 1171, with Ide d'Avesnes (1152 - 1211), dame d'Avesnes, issuing
  • Marguerite
  • Alais
  • Béatrix (1180 - 1254)
  • Ide
  • Alliette (1183 - 1241)
  • Guillaume