William III de SAYE & Sibyl MARSHAL 
They had a son named William IV de.
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Personal Details
William III de SAYE
William III de was born in 1212 in West Greenwich, Kent, England. He died at the age of 59 on February 12th, 1271 in Rochester Castle, Kent, England.
Sibyl MARSHAL
Sibyl was born about 1215 in Lenton, Lincolnshire, England. She died after October 1250.
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Children
William IV de SAYE
William IV de was born on November 20th, 1253 in Berling, Kent, England. He died at the age of 41 on September 16th, 1295.