I went to an Ivy (97 - 01). Here are some names that come to mind when I remember my "preppiest" classmates:
I think there were at least 25 different Cates/Kates/Katies in my graduating class. Possibly more. Slightly fewer Sarahs and Emilys.
Hartley Northcote- Hartley is her grandmother's maiden name of course.
Josie Ellsworth- fn Josephine Celeste Ellsworth
Poppy Carlisle (is this a real person?)
Gigi (Genevieve) Reynolds
Reece (or Rhys) Langston