Have the students come up with unusual names for themselves that are retail competitors, general terms, or opposites for some or part of their name. For example:
Kay Allbright might be Zales Nonedark
Kay is a jewelry store so it becomes a different jewelry store "Zales".
All would become it's opposite "None".
Bright would become it's opposite "Dark".
The possibilities are endless and can be very amusing!!!
Another thing I've seen is to create your "blues" name or superhero name from the Captain Underpants books. I received those as emails then printed them so I would have to search for them, but they turn out very funny, but very strange.