Guillaume de Ponthieu

• 
• Born in 1178
• Deceased on October 13, 1221, at the approximate age of 42 years

Family

• Married on August 20, 1195 in Meudon, with Adèle (Capétiens) (1160 - c. 1213), dame de Saint-Riquier, issuing
  • Isabelle
  • Jean
  • Marie (1199 - 1250)