If you’re using your Xbox Gamertag as your name, you’ll need to alter your Gamertag as well if you want your username to change. This is done via the Microsoft website rather than Roblox.

Roblox allows all users to change their Roblox account's display name in the account settings without spending a dime. Here's how to do it.

A Roblox Display Name means that as well as customizing the appearance of your avatar, you can also determine what name is seen by other players and will appear in different areas of the game too ...

MICROSOFT is finally letting you pick any Xbox gamertag you like – even if the username is already taken. It means Xbox gamers won’t be forced to pick rubbish names simply because someone els… ...