Elizabeth Stafford, Countess of Sussex paternal aunt was Margaret Dayrell who was wife to James Tuchet, 7th Baron Audley. Her maternal uncles included (among others) Anthony Woodville, 2nd Earl Rivers, Richard Woodville, 3rd Earl Rivers and Lionel Woodville, Bishop of Salisbury. Her aunts included Elizabeth Woodville and Mary Woodville, married respectively to Edward IV of England and William Herbert, 2nd Earl of Pembroke. Her first cousins included (among others) John Tuchet, 8th Baron Audley, Thomas Grey, 1st Marquess of Dorset, Richard Grey, Elizabeth of York, Mary of York, Cecily of York, Edward V of England, Margaret of York, Richard of Shrewsbury, 1st Duke of York,
Catherine Woodville, Duchess of Buckingham was married to Henry Stafford, 2nd Duke of Buckingham; both were still children. A contemporary description of Elizabeth Woodville's coronation relates that Catherine and her husband were carried on squires' shoulders due to their youth. According to Dominic Mancini, Buckingham resented his marriage to a woman of inferior birth. However, the couple had four children: In 1483, Buckingham first allied himself to Richard, Duke of Gloucester, helping him succeed to the throne as Richard III, and then to Henry Tudor, leading an unsuccessful rebellion in his name. Buckingham was executed for treason on 2 November 1483. After Richard III was