The relay response page would have that info, I believe. You would store the parts you want displayed either in your database, associated with the transaction ID, or pass them via the redirect URL. If you're using PHP, my advice is to add something like this to your relay response, then look at the log output so you can see what fields are available:
$logfile = "{$_SERVER['DOCUMENT_ROOT']}/log_folder/log.txt";
$handle = fopen($logfile, 'a');
fwrite($handle, print_r($response, true));
The other option is to have your receipt page look up the transaction using the Transaction Details API (separate from the main SDK) and the GetTransactionDetails() function. This may be a more elegant solution, but I'm not sure if it returns the customer's name as part of the details. Only way to find out is to try it and see.