How do you change your name in runescape?

To change your display name, visit the Account Management section of RuneScape or FunOrb and select 'Change your display name'. You can then change your display name to anything that is not currently in use by or 'held' for (see next paragraph) another player. (NOTE: Once you have changed your display name, you will be unable to do so again for 28 days, even to revert back to your previous display name, so make sure you are happy with your new name before confirming the change.)

You must also be a member, F2P cannot change their display name.