Family: William de Ferrers, 4th Earl of Derby / Agnes, of Chester (F4176)
m. 1192
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Male
William de Ferrers, 4th Earl of Derby
Birth Death 22 Sep 1247 Burial Marriage 1192 [1] Father William de Ferrers, 3rd Earl of Derby | F3308 Group Sheet Mother Sibyl de Braose | F3308 Group Sheet
Female
Agnes, of Chester
Birth Death 2 Nov 1247 Burial Father Hugh Of Kevelioc Earl Of Chester | F4342 Group Sheet Mother Bertrade de Montfort | F4342 Group Sheet
Male
William de Ferrers, 5th Earl of Derby
Birth Death Mar 1254 Evington, Leicestershire, England 
Burial Spouse Margaret de Quincy | F4177 Marriage
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Sources - [S13] Weis, Frederick Lewis, Ancestral Roots of Certain American Colonists Who Came to America before 1700 (Seventh Edition), (Name: Genealogical Publishing Co., Inc., Baltimore, 1992;).
- [S13] Weis, Frederick Lewis, Ancestral Roots of Certain American Colonists Who Came to America before 1700 (Seventh Edition), (Name: Genealogical Publishing Co., Inc., Baltimore, 1992;).