Display Name by Alex Chernov for xenforo
Xenforo add-on Display Name by Alex Chernov, adds display name functionality. If display name is set it will be shown instead of username.
Can be useful as is (user editable) or for other purposes like beautiful name for administrators\moderators.
Provides two helpers 'displaynamehtml' and 'richdisplayname', which override core 'usernamehtml' and 'richusername'. But if your templates uses $visitor.username to output name of user, you need replace it with helper.