Sibyl Marshal
- Born in 1201
- Deceased on April 27, 1245, at the approximate age of 43 years
Parents
- William Ier Marshal, Guillaume le Maréchal (1146 - 1219), chevalier, Earl of Pembroke
- Isabel de Clare (c. 1172 - 1220), Countess of Pembroke
Family
- Married with William Ferrers (1193 - 1254), Earl of Derby, issuing