Family: 5th Earl of Derby Sir William de Ferrers, III / Sibyl Marshall (F5202)
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4th Earl of Derby Sir William de Ferrers, II (1168-1247) |
Agnes de Kevelioc (1174-1247) |
1st Earl of Pembroke William Marshall, the Elder (1146-1219) |
4th Countess of Pembroke Isabella de Clare (1172-1220) |
Countess of Cornwall Isabel Marshall (1200-1240) |
5th Earl of Derby Sir William de Ferrers, III (1200-1254) |
Sibyl Marshall (1209-1245) |
Joan de Ferrers (1233- ) |