For most of my life I thought it was Longhorn (maybe merging it with Foghorn Leghorn from the Bugs Bunny cartoons). Only after doing quizzes on Jetpunk did I learn the actual name and spelling.
Somehow the hardest part of this is recognizing who some of these people are without the middle name. If the middle name is too well known it starts to make it harder. Like, who is this "Laura Wilder"... oh.
Hillary Clinton's middle name is Diane. Harriet Beecher Stowe's middle name was Elizabeth, Jacqueline Joyner-Kersee's middle name is not Joyner, that is her maiden name. Jacqueline Kennedy Onassis' middle name was Lee, June Carter Cash's middle name was June! Her first name was Valerie. Laura Ingalls Wilder's middle name was also Elizabeth. Mary Baker Eddy, Nicole Brown Simpson, and Sandra Day O'connor are all known by first, maiden, and married last names. Maiden names are not middle names! :) Their actual middle names should be accepted answers, or you should find better examples of famous women who aren't simply known as FirstName Dad'sName Husband'sName.