John 1St Baron De Grey & Avice Marmion 
John 1St Baron De and Avice were married in a religious ceremony after 1328 in 2ND Wife.1 They had two sons and a daughter, named John, Robert and Maud (Matilda).
Family Notes
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Personal Details
John 1St Baron De Grey
John 1St Baron De was born on October 9th, 1300 in Rotherfield Greys Castle, Henley-On-Thames, Oxfordshire, England and his baptism took place on November 1st, 1300 in Rotherfield, Sussex, England.2 He died at the age of 58 on September 1st, 1359 in Rotherfield, Sussex, England.3
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Children
John Marmion
John was born in 1343 in Of Rotherfield, Oxfordshire, England. He died at the age of 25 on October 25th, 1368 in D.S.P. Spain.
Robert Grey
Robert was born about 1345 in Ravensworth, Richmond, North Riding Yorkshire, England. He died before November 30th, 1367 in Spm.
Maud (Matilda) Grey
Maud (Matilda) was born about 1350 in Rotherfield, Leicestershire, England. She was buried in Stanton Harcourt, Oxfordshire, England.
1 Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Lt @ VI:146-7
2 Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Lt @ VI:145-7
3 Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Lt @ VI:147-9
2 Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Lt @ VI:145-7
3 Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Lt @ VI:147-9