He married Margaret de Beauchamp about 1425, she was the daughter of Sir John Beauchamp and Elizabeth Stourton
Their Children were
Sir John St John (d.1513/14) of Bletsoe, who married Alice Bradshagh, daughter of Sir Thomas Bradshagh, of Haigh, Lancashire. (my ancestor)
Oliver St 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 St John, who married Geoffrey Pole, esquire.
Mary St John, who married Sir Richard Frogenall.
Elizabeth St John (d. before 3 July 1494) who married firstly, before 2 April 1450, as his second wife, William la Zouche, 5th Baron Zouche (d. 25 December 1462) of Harringworth, and secondly, before 10 December 1471, as his second wife, John Scrope, 5th Baron Scrope of Bolton (d. 17 August 1498).
Agnes St John, who married David Malpas.
Margaret St John, Abbess of Shaftesbury.
He married Margaret de Beauchamp about 1425, she was the daughter of Sir John Beauchamp and Elizabeth Stourton
Their Children were
Sir John St John (d.1513/14) of Bletsoe, who married Alice Bradshagh, daughter of Sir Thomas Bradshagh, of Haigh, Lancashire. (my ancestor)
Oliver St 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 St John, who married Geoffrey Pole, esquire.
Mary St John, who married Sir Richard Frogenall.
Elizabeth St John (d. before 3 July 1494) who married firstly, before 2 April 1450, as his second wife, William la Zouche, 5th Baron Zouche (d. 25 December 1462) of Harringworth, and secondly, before 10 December 1471, as his second wife, John Scrope, 5th Baron Scrope of Bolton (d. 17 August 1498).
Agnes St John, who married David Malpas.
Margaret St John, Abbess of Shaftesbury.