 FAIR: Peytons full name (as seen mentioned many times) is Peyton  Elizabeth Sawyer. Peyton says to Haley at one point that Brooke has  been calling her "Peyton Marie Sawyer" because of the way she was  acting. Peyton then explains that the initials spell PMS revealing  that its just a joke between her and Brooke. Therefore, Peytons  middle name does not change at any time in the series.