Mary De FERRERS LADY OF OVERSLEY 
Mary De was born in 1394 in Of, Oversley, Warwickshire, England. Mary De's father was sir Robert De FERRERS and her mother was Joan De BEAUFORT COUNTESS OF WESTMORLAND. Her maternal grandparents were John "Of Gaunt" Of ENGLAND DUKE OF LANCASTER and Katherine De ROET. She had a sister named Elizabeth De. She was the younger of the two children. She had nine half-brothers and five half-sisters, named Richard, William, Henry De, Thomas De, Cuthbert De, Robert, John De, George, Edward, Eleanor, Joan, Catherine De, Anne and Cecily.-
Ancestor Pedigree Chart
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- b.~ 1365 in Of, Willisham, Suffolk, England d.<29 Nov 1396
- b.1394 in Of, Oversley, Warwickshire, England d.25 Jan 1457/1458
- b.24 Jun 1340 in Abbaye de St Bavon, Ghent, Flandre-Orientale, Belgium d.3 Feb 1398/1399 in Leicester Castle, Leicester, Leicestershire, England
- b.~ 1368 in Ch√¢teau De Beaufort, Maine-et-Loire, France d.13 Nov 1440 in Howden, Yorkshire, England
- b.1350 in Of, Picardy, Somme, France d.10 May 1403 in Lincoln, Lincolnshire, England
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Mary De and Ralph De were married in a religious ceremony about 1413 in Of, Oversley, Warwickshire, England.
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