Edmund Beaufort 2nd Duke of Somerset

 Eleanor de Beauchamp
Eleanor was born about 1407.  She died about 1467.

 Margaret Beaufort
Margaret was born on May 31st, 1443 in Bletsoe Castle, Bedfordshire, England.  She died at the age of 66 on June 29th, 1509 in Abbot's House, Cheyney Gates, Westminster, London, England.  She was buried in Westminster Abbey, Westminster, London, England.