To get or change a Roblox Display Name, you should first log in to your Account Info page under Settings, then select the edit button next to the Display Name entry above your Username.

ROBLOX allows you to change this username, as well as your Display Name. It’s important to note that there are different rules and applications of both Usernames and Display Names.

Roblox allows players to create or join groups that highlight their own interests on the platform. The creator can change the name as well, but there's a fee involved.