Joan Beaufort, Countess of Westmorland

Joan Beaufort was the youngest of the four legitimised children and only daughter of John of Gaunt, 1st Duke of Lancaster, by his mistress, later third wife, Katherine Swynford. Joan married Ralph Neville, 1st Earl of Westmorland and in her widowhood became a powerful landowner in the north of England, as countess of Westmorland. Through her daughter Cecily, Joan was grandmother to kings Edward IV and Richard III, and great-great-grandmother to Henry VIII.