William De Grandison & Sybil Tregoz 
William De and Sybil were married in a religious ceremony in Of, Donyatt, Somersetshire, England.1 They had two sons and three daughters, named Piers (Peter) De, John, Agnes, Mabilia De and Katherine De.
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Personal Details
William De Grandison
William De was born in Of, Cassington, Oxfordshire, England.1 He died on June 27th, 1335.1
Sybil Tregoz
Sybil was born in 1271 in Ewyas, Herefordshire, England.1 She died at the age of 63 on October 12th, 1334.1
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Children
Piers (Peter) De Grandison
Piers (Peter) De was born in 1287 in Of, Ashperton, Herefordshire, England.1 He died at the age of 71 on August 10th, 1358 in England.1
Agnes Grandison
Agnes was born about 1289 in Bletsoe, Bedfordshire, England.1 She died on December 4th, 1348.1
Katherine De Grandison
Katherine De was born about 1304 in Ashford, Hertfordshire, England.1 She died on November 23rd, 1349 in Bisham, Berkshire, England.1