Within GroupWise, whether that be the client or webaccess, is it possible for a client to rename their display name?

Example:

"James NoName <jnoname@domain.com>" to "James and Jill <jnoname@domain.com>"

I have a client receive an e-mail that was formed similarly that looks like it was generated within the GroupWise system and never routed outside via the GWIA. None of the normal headers are in place for that. Yet a single e-mail was renamed and I haven't figured out how they did it.

Thanks

Richard