Contact Form: Name and Email in Message Body
I figured it out by duplicating the field...

&lt;input id="fromName" type="text" name="fromName" 
value="{% if message is defined %}{{ message.fromName }}{% endif %}"&gt;
{{ message is defined and message ? errorList(message.getErrors('fromName')) }}
&lt;input type="hidden" id="fullName" name="message[Full Name]" class="fullName"&gt;


Then duplicating the single entry to the hidden with some Javascript...

    $('#fromName').bind('keypress keyup blur', function() {
      $('#fullName').val($(this).val());
    });


It parses through to the email message as:

Full Name: First Last