Yeah, there is no reason to go through that to "save" some maybe-abandoned names. Names are not a limited resource, and nobody is entitled to a name just for liking it. Sorry, but there can only be one "denise" and it's in use; other Denises will just have to be "denise_lastname" or "denise2" or "the_other_denise" or whatever. Be creative! Find an unclaimed name that is "you"!