You can use this code snippet to include the Magento Send to Friend Sender Name in your email templates.
Using this variable in your email template, your visitors will be able to have their names automatically signed at the bottom of the email, when they choose to notify their friends about a given product. This will help to increase the trustworthiness of the email so the friend will be able to tell that it’s not just another spam message.
An example email message might look something like:
Hey, just thought you might be interested in taking a look at Johnson’s Magic Toothpaste. Check out the link: http://www….
To reference the sender name, just include the variable
within your email template. Not sure why it’s not in the email template by default, but now you know how do it.