Edmund Beaufort was born circa 1439 in London, Greater London, England, United Kingdom to Edmund Beaufort, 2nd Duke of Somerset (1406-1455) and Eleanor Beauchamp (1408-1467) and died 6 May 1471 Tewkesbury, Gloucestershire, England, United Kingdom of beheaded. 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.

After the defeat of the Lancastrians in 1461, Edmund was brought up in France with his younger brother John Beaufort, Marquess of Dorset, and on the execution of his elder brother Henry Beaufort, 2nd Duke of Somerset, Edmund is said to have succeeded as 3rd Duke by Lancastrians in February 1471, but his brother's attainder was never reversed, and his titles remained forfeit. In a proclamation dated 27 April 1471 Edmund is spoken of as "Edmund Beaufort, calling himself duke of Somerset".

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