You can change your Facebook username , either from your profile or from a page on which you are the administrator. First, it is worth noting that “username” is not a way of identifying the name displayed next to the profile picture. Name and username are, in practice, two different data on the platform. Understand this difference and see step-by-step how to make the desired change.
Go to your account settings:
Then click on “settings and privacy” and select “settings”;
Change your profile username:
Change your Facebook page username:
What is the difference between name and username?
The name, the information that appears next to the profile photo, corresponds to your personal identification. That is, the name and surname that appear on your identity document. It is also allowed to add a nickname in the first space, if it is a variation of your real name: Mari, instead of Mariana.
The username is the information that makes the URL personalized and is part of the “address” of your timeline on the social network. Your real name must be included in the username — a data consisting of at least five alphanumeric characters and may include periods (“.”).
Because it is part of the address of a specific timeline on the platform, no identical usernames can exist. Therefore, it is important to emphasize that capital letters and dots are not meant to make them different.
Therefore, “gabrielacosta” and “Gabriela.Costa”, for example, are considered equal options. So if the first format you type is not available, the easiest solution is to try combinations with numbers, like “gabriela.c0sta”.