Jessie Harlan Lincoln
Jessie Harlan Lincoln was the second daughter of Robert Todd Lincoln, the granddaughter of Abraham Lincoln, and the mother of Mary Lincoln Beckwith and Robert Todd Lincoln Beckwith, the last undisputed Lincoln descendant.
Jessie Harlan Lincoln was born on November 6, 1875, in Chicago, Illinois to Mary Eunice Harlan and Robert Todd Lincoln. At the time of her birth, Robert Lincoln was practicing law in Chicago. She was the last of three children of Robert Todd Lincoln. Jessies sister and brother were, respectively
Source: Wikipedia