Family: William de Ferrers and Sibyl Marshal

Husband/father: William de Ferrers
Wife/mother: Sibyl Marshal
Children:

• Agnes de Ferrers

Individual: William de Ferrers

Marital or other families:

• William de Ferrers and Sibyl Marshal

Sex: Male

Source: Complete Peerage, The

• Page: Volume 12, part 2, page 278

Individual: Sibyl Marshal

Parental family: William Marshal
Marital or other families:

• William de Ferrers and Sibyl Marshal

Sex: Female

Source: Complete Peerage, The

• Page: Volume 12, part 2, page 278

Family: William Marshal

Husband/father: William Marshal
Children:

• Sibyl Marshal

Individual: William Marshal

Marital or other families:

• William Marshal

Sex: Male

Source: Complete Peerage, The

• Page: Volume 12, part 2, page 278

Individual: Agnes de Ferrers

Parental family: William de Ferrers and Sibyl Marshal
Marital or other families:

• William de Vescy and Agnes de Ferrers

Sex: Female

Note: 1st daughter of William

Death:

• Date: 11 May 1290

Source: Complete Peerage, The

• Page: Volume 12, part 2, pages 277, 278

Family: William de Vescy and Isabel Longespee

Husband/father: William de Vescy
Wife/mother: Isabel Longespee

Marriage:

• Date: shortly after 16 May 1226

Source: Complete Peerage, The

• Page: Volume 12, part 2, page 277