Margaret Beauchamp was the daughter of Sir John Beauchamp, de jure 3rd Baron Beauchamp of Bletsoe, and his second wife, Edith Stourton.
Background
Margaret Beauchamp, born about 1410, was the daughter of Sir John Beauchamp, de jure 3rd Baron Beauchamp (d 1412-1414) of Bletsoe, Bedfordshire, and his second wife, Edith Stourton (d 13 June 1441), daughter of Sir John Stourton of Stourton, Wiltshire.
Career
She was the maternal grandmother of Henry VII. Sir John Street John (d 1513/14) of Bletsoe, who married Alice Bradshagh, daughter of Sir Thomas Bradshagh, of Haigh, Lancashire. Oliver Street John (d 1497), esquire, of Lydiard Tregoze, Wiltshire, who married Elizabeth Scrope, widow successively of Sir John Bigod (d 1461) of Settrington, Yorkshire, and Henry Rochford (d 25 October 1470), esquire, of Stoke Rochford, Lincolnshire, and daughter of Henry Scrope, 4th Baron Scrope of Bolton, and Elizabeth le Scrope, daughter of John Scrope, 4th Baron Scrope of Masham. Edith Street John, who married Geoffrey Pole, esquire.
Mary Street John, who married Sir Richard Frogenall.
Agnes Street John, who married David Malpas. Margaret Street John, Abbess of Shaftesbury.
Lady Margaret Beaufort, Countess of Richmond and Derby, who married Edmund Tudor, 1st Earl of Richmond, by whom she was the mother of Henry VII. John Welles, 1st Viscount Welles, who married Cecily of York, the daughter of Edward IV of England.