This may help you.
Check the Desktop Contact List (MS Outlook, etc.). What you are looking for are discrepancies in the name of the contact, and the actual e-mail address.
For Example I may have a contact listed/named as "Me", where the e-mail address (associated) is actually
With an entry like the abovememntioned, when my BlackBerry receives an e-mail from
it will display as showing from Me on the BB (will appear as normal on my Desktop).
Hope this helps you.