The name was spelled in a variety of ways in Warwickshire. The only way it was not spelled was Shakespeare. And it was pronounced Shaxpur, though many writers on his life and works have denied this. These signatures are the only writings extant of Shaksper of Stratford. There is not a single word in manuscript of the Plays or Poems to connect him, by direct evidence, with the Shakespeare Works. There is not even a letter, a phrase, a word that has ever been known to exist in his handwriting. There is nothing on record to indicate that he could do any more than painfully scrawl his own name. There is not the slightest proof that he could express his thoughts in writing at all. There is not a scrap of paper anywhere of the debris of Shakespeare's workshop. It sounds like a Falstaff or a false spear?
more on the Signatures
SirBacon.org - Sir Francis Bacon's New Advancement of Learning