Mary Grey was born 1491 to Thomas Grey, 1st Marquess of Dorset (1451-1501) and Cecily Bonville, 7th Baroness Harington (1460-1529) and died 22 February 1538 of unspecified causes. She married Walter Devereux, 1st Viscount Hereford (1488-1558) 15 December 1503 JL . Alfred the Great (849-899)/s, Charlemagne (747-814)/s, Henry II of England (1133-1189)/s, Hugh Capet (c940-996)/s, William I of England (1027-1087)/s, Rollo of Normandy (860-932)/s.
|Offspring of Walter Devereux, 1st Viscount Hereford and Mary Grey (1491-1538)|
|Richard Devereux (c1513-1547)||1513||13 October 1547||Dorothy Hastings (c1520-1547)|