William III de Ferrers & Sibyl Marshal 
William III and Sibyl were married in a religious ceremony before May 14th, 1219. They had seven daughters named Alianore, Agnes, Isabel, Jean, Sybil, Agatha and Maud.
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Personal Details
William III de Ferrers
William III was born in Ferrers, Derbyshire, England. He died in Evington, Leicestershire, England. He was buried on March 31st, 1254 in Merevale Abbey.
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Children
Agnes de Ferrers
Agnes was born in 1224 in Derbyshire, England. She died at the age of 66 on May 11th, 1290.
Isabel de Ferrers
Isabel was born in 1226 in Derbyshire, England. She died at the age of 34 on November 11th, 1260 in Austria-Hungary.1
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