Would you please add a non-constituent participant nickname field to database view and nxt view of events? By not having the field you have to (a) know which participants are constituents (b) pull the nickname/preferred name for those constituent participants and (c) pull the first name of non-constituent participants. 

Know how good it feels when a major donor or board chair walks up to a nametag table and sees F. Smith instead of Bill Smith because his full legal name is Franklin William Smith but he hates Franklin so is addressed as Mr. F. William Smith by your organization?

Or he walks up to the table and sees Bill Smith and his guest is ______ Doe because Jane Doe is a non-constituent participant and you used nicknames as the field for nametags.