 Originally Jolene Blalock (qv)s character of TPol was supposed  to be called TPau. The character appears in an episode of Star  Trek. They changed it at the last minute because if they used the  character of TPau, they would have to pay royalties to the writer  of the original Star Trek episode that she appeared in every time  TPau was used. Which would mean that they would have to pay a  royalty for every episode of "Enterprise." Incidentally, the  character of TPau later made an appearance in the three episodes of  the Vulcan renaissance story arc in season 4.