Margaret would be the last princess born to a reigning English monarch until the birth of  who's wife?
Margaret, Countess of Pembroke Margaret of England (20 July 1346 – October/December 1361) was a royal princess born in Windsor, the daughter of King Edward III of England and his consort, Philippa of Hainault. Margaret would be the last princess born to a reigning English monarch for over a century, until the birth of Elizabeth of York in 1466. She was also known as Margaret of Windsor.
Joan Bulmer Joan Bulmer (1519–December 1590), born Joan Acworth, was an English gentlewoman during the reign of Henry VIII. The daughter of George Acworth and Margaret Wilberforce, Joan married William Bulmer at a young age. The marriage was short lived, however, as she left his house to enter into the service of Agnes Tinley, the Dowager Duchess of Norfolk. While in service to the duchess Bulmer became acquainted with Catherine Howard, who would go on to become the fifth wife of King Henry VIII. It was during this time that Joan became involved in an affair with Edward Waldegrave.