William FITZWILLIAM & Maud de CROMWELL 
They had a son named John.
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Personal Details
William FITZWILLIAM
William was born about 1352 in Enley, Yorkshire, England. He died on April 8th, 1398.
Maud de CROMWELL
Maud de was born about 1355 in Tattershall, Horncastle, Lincolnshire, England. She died after 1418.
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Children
John FITZWILLIAM
John was born on July 25th, 1377 in Sprotborough. Yorkshire, England. He died at the age of 39 on July 5th, 1417.