The pattern follows the sequence of the first names of the United States in chronological order. The next two terms are James and John - which refer to James Monroe and John Quincy Adams - the fourth and fifth US presidents respectively.
Which President served as a lieutenant colonel in the Spanish-American war? Who was the first Democrat elected after the Civil War? Who introduced Social Security? If you're looking to learn more about the past Presidents who have led our country, take a look at our full set of their biographies from Whitehouse.gov.
For a chronological list which contains entries for each president with his corresponding first lady and vice president, go to Loc.gov.