History of the English line of succession to the French succession. On the day of Henry IV's death, 20 March 1413, the line of succession to the English throne following agnatic primogeniture was: Upon his death, the throne passed smoothly to the first person in line, who became Henry V. On the day of Henry V's death, 31 August 1422, the line of succession following agnatic primogeniture was: Upon his death, the throne passed smoothly to the first person in line, who became Henry VI. On the day of Henry VI's first deposition, 4 March 1461, the line of succession following agnatic primogeniture was; However, during the
Henry Stafford (c. 1425 – 1471) Henry Stafford (c. 1425 – 1471) Sir Henry Stafford (c. 1425 – 4 October 1471) was the second son of Humphrey Stafford, 1st Duke of Buckingham and Anne Neville, daughter of Ralph de Neville, 1st Earl of Westmorland, and Lady Joan Beaufort. Henry's elder brother, also named Humphrey, died before their father, and so it was Henry's nephew, also Henry, who became the 2nd Duke of Buckingham. Stafford was the third husband of Margaret Beaufort, Countess of Richmond and Derby. The marriage was relatively long and successful and coincided roughly with the minority of Margaret's son, the future Henry VII