If you click on the member services tab, there is a link to the prefixes and suffix list at the bottom. Above where you see the Suffix list is the alphabet, click on the letter that starts the prefix, and it will come up with all names registered for that letter.
Amanda
ETA: You may have to move the page so that the member services button is right at the top of the screen. the Prefix and Suffix list is after the All star standings links.