Lady Jane Seymour for the tomb of Margaret of Valois, queen of Navarre and also an author, which was published in 1550. Lady Jane Seymour Lady Jane Seymour (c.1541 – 19 March 1561) was an influential writer during the sixteenth century in England, along with her sisters, Lady Margaret Seymour and Anne Seymour, Countess of Warwick. Their brother was Edward Seymour, 1st Earl of Hertford. They were the children of Edward Seymour, 1st Duke of Somerset, who from 1547 was the Lord Protector of England after the death of King Henry VIII and during the minority of Jane's first cousin, King Edward VI.
Frances Seymour, Duchess of Somerset numerous descendants include Queen Elizabeth The Queen Mother (and therefore The Queen and all of her blood descendants), Diana, Princess of Wales, and Sarah, Duchess of York. Frances Seymour, Duchess of Somerset Frances Seymour, Duchess of Somerset ("née" Devereux; 30 September 1599 – 24 April 1674), was an English noblewoman who lived during the reigns of Elizabeth I, James I, Charles I and Charles II. Her father was Robert Devereux, 2nd Earl of Essex, Elizabeth I's favourite who was executed for treason in 1601. She was the second wife of William Seymour, 2nd Duke of Somerset, and the mother of