What U.S. president was known as “His Rotundity”? July 16, 2020October 22, 2011 by Pamela Landy John Adams (served 1797-1801) was known as “His Rotundity”. Related Answers What was the Virginia dynasty? How were Samuel, John, and John Quincy Adams related? Who was the first president defeated for reelection? What U.S. president was known as “His Accidency”? Who is the only U.S. president known to have killed a man in a duel? Who was the first U.S. president to have more than one woman in his cabinet?