To buy Minecraft, you need to create a Microsoft account. During this process, you will enter various details, including the gamertag or username you want other players to see in-game.

How do I find my Minecraft username? On the change name screen, you can see your previous name located right after the field “Current Java/Bedrock Profile Name”.

There are a few different ways to change your Minecraft username, but most users will do it through the Xbox website.