I'll do better than five.
                                      John Brown
                                      John Birch
                                      John Wayne
                                      John Jacob Astor
                                      John Jacob Jingleheimer Schmidt
                                      Johnny Appleseed
                                      John L. Sullivan
                                      John L. Lewis
                                      Jon  Jonson from Visconsin
                                      John Dillenger
                                      Johnny Stompenotto
                                        and
                                      John Wei
    Oh, and add one woman, Empress Wu.

CDM