Check out this thread for a function that will list all Environ variables your computers operating system will provide... Get Current User Name and Computer Name
You can grab the users full name [First Last] using the API at Dev's site. It works as posted. For a quick test just add this function to the module.
Code:
Function TestGetFullNameOfLoggedUser()
MsgBox fGetFullNameOfLoggedUser
'MsgBox fGetFullNameOfLoggedUser(Environ("UserName")) 'either should work
End Function