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.
Katharine, Duchess of Kent Katharine, Duchess of Kent, {'1': ", '2': ", '3': ", '4': "} (Katharine Lucy Mary; "née" Worsley; born 22 February 1933), is a member of the British Royal Family. Her husband, Prince Edward, Duke of Kent, is a first cousin of Queen Elizabeth II.