Harry S. Truman was the 33rd President of the United States. The final running mate of President Franklin D. Roosevelt in 1944, Truman succeeded to the presidency on April 12, 1945, when Roosevelt died after months of declining health. Presidential term April 12, 1945 – January 20, 1953.
Sarah Angelica Singleton Van Buren was the daughter-in-law of the 8th United States President Martin Van Buren. She was married to the President's son, Abraham Van Buren. She assumed the post of First Lady because the president's wife had died 18 years earlier and he remained unwed throughout the rest of his life. - Wikipedia, the free encyclopedia
2. Abigail Adams - The mother of the sixth U.S. president John Quincy Adams, Abigail was the first first lady to live in the White House when she moved into the then-unfinished mansion in November 1800.