Alice Cornelia Thaw
Alice Cornelia Thaw was an American philanthropist and, upon her marriage to George Seymour, 7th Marquess of Hertford, the Countess of Yarmouth.
Thaw was born on January 2, 1880 to William Thaw, Sr. and Mary Sibbet Copley. She was the younger sister of Harry Kendall Thaw.
Source: Wikipedia