Sir William fitzWilliam
William was born about 1276 in Elmley, Yorkshire, England .  He died on April 11th, 1341 in Sprotborough, Yorkshire, England .

 Elizabeth Clinton
Elizabeth was born about 1324 in Holme Pierrepont, Nottinghamshire, England.

 Margaret fitzWilliam
Margaret was born about 1324 in Holme Pierrepont, Nottinghamshire, England.