Is this possible with custom sort in Excel

I have a list of of names I need to sort alphabetically by last name. However, if there an "Anonymous" donor, they want the sort that on the top of the list. I started thinking that it might be possible with a custom list sort option if I can get everyone else thrown into a wildcard bucket in the sort. Is that at all possible or does that even make sense? I was just going sort and then do it manually, but I'm hopeful this will work. I would create a custom list of all names, but I want them to use the same option next year. Please let me know, thanks Dan

Never Mind. I guess I should just have tried it out with a wildcard. It works fine.