Alternate spellings would be great, and guessing the first name would also be good. Maybe you could facilitate this:
1. What's your crush's full name?
2. What's your crush's first name?
3. What's your crush's screen name?
I got 3 guesses for her twitter handle, and 1 for her first name, and 2 for first and last name. I happen to know her middle name, and entered that, so it registered all of these as incorrect.