Étienne Ier de Penthièvre

• 
• Born in 1055
• Deceased in 1137, at the approximate age of 81 years

Parents

• Eudes Ier de Penthièvre (999 - 1079), comte de Penthièvre
• Agnès de Cornouaille (1025 - 1056)

Family

• Married with Havoise de Blois, alias Havoise de Guingamp, issuing
  • Agnorie
  • Alain III (1100 - 1146)
  • Henri Ier ( - c. 1183)
  • Geoffroy II ( - 1148)
  • Olive
  • Théophanie
  • Marguerite