Jill Kristin McCormick is a fictional character made up mostly by Vedder himself and materially developed by Pearl Jam s PR machinery Vanderberg Communications managed by Nicole Vanderberg The fact that McCormick s birth date was changed can prove a point that data for this article is arbitrarily written with no real verifiable data source or document to support it The person who poses for this personality is actually named Kathy Davis a cousin of Eddie Vedder s who also pretends to be his spouse but is actually the girlfriend of Pearl Jam fan club manager Tim Bierman Also one needs to check the information on her children They are not Vedder s but Bierman s No reliable source supports the claim that Vedder is actually the father This therefore makes the all of the information details on this person with regards to this article questionable