Question

who are the 5 u.s. presidents whose last names start with a vowel

Answer 1

Obama, Eisenhower, Arthur, Adams, and Adams

Answer 2

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 :)