FM, It seems that the names are personalized, how I won't hazard a guess. I found a
online quiz that might help you with a name. I also saw a link to a sight to a
name generator but have not figured out enough on how they relate nick names to the person in question.
So far I see a lot of names containing the word KLOWNS then others include JUGGALO but there must be more.
Personally I would go for the death theme, you know like
Happy Rapture Klown, again that's me.