Family: 3rd Earl of Derby Sir William de Ferrers, I / Sybil de Braose (F1819)
-
Male
3rd Earl of Derby Sir William de Ferrers, I
Birth 1140 Death 1190 Israel 
Burial Acre Crusader Cemetery, Israel Marriage Father 2nd Earl of Derby Robert de Ferrers, II | F5109 Group Sheet Mother Margaret Peverel | F5109 Group Sheet
Female
Sybil de Braose
Birth 1157 Sussex, England Death 1228 Derbyshire, England Burial Father 3rd Lord of Bramber William de Braose, II | F4404 Group Sheet Mother Bertha de Pitres | F4404 Group Sheet
Male
4th Earl of Derby Sir William de Ferrers, II
Birth 1168 Tutbury, Staffordshire, England Death 1247 Duffield, Derbyshire, England Burial Stowe-by-Chartley, Staffordshire, England Spouse Agnes de Kevelioc | F5119 Marriage