Name the US President whose niece was his First Lady.
First Lady another woman, such as the President's daughter, has filled the duties of First Lady as hostess in the White House, if the President's wife was unwilling, unable, or if the President was a widower or bachelor. Harriet Lane, niece of bachelor President James Buchanan was the first non-spouse to be called First Lady. South Korean President Park Geun-hye has been referred to as First Lady to former President Park Chung-hee, who is her father. The title was bestowed upon her after her mother's assassination. The title was also officially bestowed on Victoria Quirino-Delgado, the daughter of widower Elpidio Quirino (1948–53),
First Lady of the United States bachelor or widower, or when the wife of the president was unable to fulfill the duties of the First Lady herself. In these cases, the position has been filled by a female relative or friend of the president, such as Jefferson's daughter Martha Jefferson Randolph, Jackson's daughter-in-law Sarah Yorke Jackson and his wife's niece Emily Donelson, Taylor's daughter Mary Elizabeth Bliss, Benjamin Harrison's daughter Mary Harrison McKee, Buchanan's niece Harriet Lane, and Cleveland's sister Rose Cleveland. The position of the First Lady is not an elected one and carries only ceremonial duties. Nonetheless, first ladies have held a highly visible