Aww, man. I tried to put together Spanish names that would work, and I actually thought of "Julio Iglesias," but I didn't know that was the name of a real person, so I didn't try it.
I find it strange that only 57% got Joe Biden, a lower percentage than Madison or Kennedy, when more recent people generally have an advantage in these quizzes.
Madison and Kennedy are listed as presidents, whereas Biden is listed as Vice President, an office whose holders are less likely remembered. Also, the word "veep" is used in the clue which not everyone might understand, especially non-Americans.
Blitzed through it all only to be thoroughly disappointed that I had no idea on the very final 2. Judging by the stats, I'm not the only one to suffer this heartbreak.