Site Rules are as follows:
If it's not a proper person's name (e.g., "Mickey Mantle"), the full name should be in the Last Name field and the First Name field should be left empty. So, "Mickey Mouse" should have nothing in first name and "Mickey Mouse" would be fully in the Last Name field, despite what the system will auto-populate on the Add Name page.
This holds true for MtG "characters" as well.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).