You can change your name in the Java Edition for free as many times as you want, but you must wait 30 days between name changes. For the Bedrock edition, it uses a Microsoft Account.

Select “Profile Name” Change to the desired name and save This name change doesn’t effect the Gamertag found on the Xbox account, and will only be shown when playing Java edition.

Go to the homepage of Minecraft and click “Log in” on the navigation located in the upper right corner. Then click “Sign in with Microsoft”. Then use your login credential to log in. You ...

To change your Minecraft name in the Java Edition, head to Minecraft.net and log in with your account. Once done, head to the profile page, look for the Minecraft: Java Edition box, and click ...