William de Ferrers, 4th Earl of Derby

English Earl (1168–1247)

Parents

• Sibyl de Braose
• William de Ferrers, 3rd Earl of Derby

Children

• Agnes de Ferrers
• Berta (?)
• William de Ferrers, 5th Earl of Derby

Siblings

• Walkelin de Derby
• Millicent de Ferrers
• Petronell de Ferrers
• Agatha de Ferrers
• Walcheline de Ferrers, Lord of Egginton

Partners

• Agnes of Chester