Family: William De Ferrers, 3rd Earl of Derby / Sibyl De Brewes (F884)
m. Abt 1166
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Male
William De Ferrers, 3rd Earl of Derby
Birth 1140 Staffordshire, England 
Christening 1136 Staffordshire, England Death 31 Dec 1189 Acre, Israel Burial 1190 Jerusalem, Israel Marriage Abt 1166 Sussex, England Father Mother
Female
Sibyl De Brewes
Birth Abt 1155 Death 5 Feb 1227 Derbyshire, England Burial Feb 1227 Father William De Braose, 3rd Lord Of Bramber | F899 Group Sheet Mother Bertha Fitzmiles | F899 Group Sheet
Female
+ Isabel Millicent De Ferrers
Birth 1166 Herefordshire, England Christening Feb 1166 Staffordshire, England Death 31 May 1252 Gloucestershire, England Burial May 1252 Gloucestershire, England Spouse Roger De Mortimer, Lord Wigmore | F4502 Marriage Abt 1184 Herefordshire, England
Male
+ William De Ferrers, 4th Earl of Derby
Birth Abt 1168 Derbyshire, England Death 22 Sep 1247 Derbyshire, England Burial 1247 Staffordshire, England Spouse Agnes Meschines | F925 Marriage 2 Nov 1192 Cheshireshire, England