In Design Market, we require every customer to provide their "Full Name" when register with an account for identification. If you would like to change your account name. Please refer to How Do I Edit My Account Info?
From the account info, you are able to see your "Nickname" in DMKT
From the editing page, we can see the "Full Name" and "Nickname". "Full Name" represents your personal identification, and "Nickname" is a public information in DMKT. It can be your first name, initials, a nickname you use in real life.
The above are your account name info. If you would like to know how to edit your shop name, please refer to How to Edit Your Shop Info?