Thierry er Thierry I er

• 
• Born circa 1030 in Kleve
• Deceased after 1070

Parents

• Rütger de Clèves (c. 990 - )
• Athela de Hamaland

Family

• Married with Béatrix Ne (c. 1020 - aft. 1055), issuing
  • Thierry (c. 1055 - aft. 1114)