I'm not sure what you mean by keep the same names? Do you mean keep the actor/actress's first names and just change their last name? If that's what you mean, it's because, first of all, it doesn't seem as creative to me to do it that way, and second of all, then I'd have 2 Jennifers (Aniston and Love Hewitt) and 2 Rachels (Bilson and Weisz)! lol... if you mean something else, then I'm not getting it... lol