Miniature of Lady Jane Grey (1536/1537 – 12 February 1554). Her married name was Jane Dudley, and she's also known as The Nine Days' Queen. An English noblewoman and de facto monarch of England from 10 July until 19 July 1553. She was subsequently executed. The great-granddaughter of Henry VII through his younger daughter Mary, Jane was a first cousin once removed of Edward VI.