Obama, Eisenhower, Arthur, Adams, and Adams
John Adams 2nd President (his son) John Quincy Adams 6th president Chester A. Arthur 21st president Dwight D. Eisenhower 34th president Barack Obama 44th president That's all of them :)
The five U.S. presidents whose last names start with a vowel are Adams, Eisenhower, Obama, and Arthur. John Adams and John Quincy Adams make up two separate entries with the last name Adams. It's important to note that only two presidents starting with the vowel 'A' in their last names are to be counted distinctly.
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