The question doesn't really make sense. If Johnny Appleseed was a real person, then his real name would be Johnny Appleseed. But it isn't - it's John Chapman.
It would be cool if the stats at the end of the quiz showed the percentage of people who guessed each answer. I'd love to know how many people guessed the dust bowl was the first college football bowl game! ;)
The migration of English to Northeastern America in the 1630s is also known as the "Great Migration." Most of my ancestors were part of that movement. (My dad used to say that our people came over on a rowboat following the Mayflower.)
But seriously, for a simple question like "Who was X?", Google/Wikipedia are going to be way better than the Jetpunk comments section.