Winners are shown on the Prizes and Winners page.
You can control what information is shown:
Go to 'Sign-up page' and adjust your settings for each signup field under 'Winner list display style':
Your options are:
Do not show: Doesn't show this field.
First word initial: Shows the first name as an initial and then the rest of the name; H. Christian Andersen
Last word initial: Shows the first name(s) and the last name as initial; Hans Christian A.
Full tekst: Show the full name; Hans Christian Andersen
Please check all your signup fields to make sure the settings are as you want them. The email fields should almost always be set to 'Do not show'.