This Seeking Tech guide will show you how to hide your real name from the Xbox dashboard. You can do so with the following steps:
1. You first need to go to the Settings menu.
2. From there, select Account.
3. On the right side, select Privacy and Online Safety.
4. Next, you need to select Xbox Privacy.
5. You should then select View Details and Customize.
6. Afterwards, select Profile.
7. You should then select the Edit Name option.
8. Finally, change the first and last name.
9. When you exit back out to the dashboard, your real name will no longer be displayed.