Maybe you have actually chosen that xXgOtHgUrL420Xx wasn't a sensible choice for a username-- or perhaps you're just looking for a.
Changing Facebook Url
1. Log into Facebook https://en-gb.facebook.com/login/
2. Get to Account Settings.
Click the equipment icon in the top-right of Facebook and choose Account Settings. In the left-hand column, choose General. Find the Username field and click Edit.
3. Enter a new username.
Enter your new username and click Save Modifications.
Note:.
Facebook states that you can just alter your username as soon as, so select wisely! Your company may take a look at this someday.