Family: 4th Earl of Derby Sir William de Ferrers, II / Agnes de Kevelioc (F5119)
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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 Marriage Father 3rd Earl of Derby Sir William de Ferrers, I | F1819 Group Sheet Mother Sybil de Braose | F1819 Group Sheet
Female
Agnes de Kevelioc
Birth 1174 Chester, Cheshire, England Death 2 Nov 1247 Stowe-by-Chartley, Staffordshire, England Burial Stowe-by-Chartley, Staffordshire, England Father 5th Earl of Chester Sir Hugh de Kevelioc | F3399 Group Sheet Mother Bertrade de Montfort | F3399 Group Sheet
Male
5th Earl of Derby Sir William de Ferrers, III
Birth 1200 Derbyshire, England Death 24 Mar 1254 Evington, Leicestershire, England Burial Warwickshire, England Spouse Sibyl Marshall | F5202 Marriage Spouse Margaret de Quincy | F5203 Marriage