Margaret O'Neill Eaton
Margaret O'Neill (or O'Neale) Eaton (December 3, 1799 – November 8, 1879), better known as Peggy Eaton, was the daughter of Rhoda Howell and William O'Neale, the owner of Franklin House, a popular Washington, D.C. hotel. Peggy was noted for her beauty, wit and vivacity. Through her marriage to United States Senator John Henry Eaton, she had a central role in the Petticoat affair that disrupted the Cabinet of Andrew Jackson.
Read more about Margaret O'Neill Eaton: First Marriage, Second Marriage and Scandal, Third Marriage and Later Life, Cultural References