the true Cross to John de Vere, 15th Earl of Oxford. The Earl of Oxford is said to have had an illegitimate daughter, Katherine de Vere (d. after 20 June 1504), who married Sir Robert Broughton, 'one of the richest non-baronial landowners in England'. Broughton appointed the 13th Earl as supervisor of his will. Sir Robert Broughton and Katherine de Vere had two sons and a daughter: John Broughton (d. 24 January 1518) of Toddington, Bedfordshire, who married Anne Sapcote (d. 14 March 1559), the daughter and heir of Sir Guy Sapcote by Margaret Wolston, daughter and heir of Sir Guy Wolston, and by her had a son, John Broughton (d.1528), and two daughters, Katherine Broughton (d. 23 April 1535), who was the first wife of William Howard, 1st Baron Howard of Effingham, and Anne Broughton, who married, as his second wife, by dispensation dated 24 May 1539, Sir Thomas Cheyney. Robert Broughton. Margaret Broughton, who married Henry Everard, by whom she had several children, including Elizabeth Everard, who married Sir William Clopton (d. 6 October 1568) of Liston Hall, Essex. Notes References Attribution External links Will of John de Vere, Earl of Oxford, proved 10 May 1513, PROB 11/17/379, National Archives Retrieved 1 June 2013 Will of Sir Robert Broughton, proved 10 July 1507, PROB 11/15/535, National Archives Retrieved 1 June 2013 Will of John Broughton, proved 4 June 1519, PROB 11/19/251, National Archives Retrieved 1 June 2013 1442 births 1513 deaths 15th-century English people 16th-century English nobility 16th-century Royal Navy personnel John John de Vere, 13th Earl Knights of the Garter Knights of the Bath Lord Great Chamberlains Lord High Admirals of England Lord High Stewards Male Shakespearean characters People from Castle Hedingham People of the Wars of the Roses