The following is a list of famous people who are believed to have been polydactyl:
Anne Boleyn - said to have had eleven fingers, although she only had a double fingernail and a lump on her little finger[1] (http://www.straightdope.com/classics/a3_053)
... and was a notary of Gothic kings in Italy. At the time of Justinian, he was a Christian and possibly bishop of Croton. In approximately 580, he wrote "De origine ...