When you create your Pixlmob profile, you can set the Display Name that appears in the marketplace to customers. If you'd like to change the name customers see, you can change this from your profile in Pixlmob.
The username you enter when creating your Pixlmob account is used for internal purposes only and is not displayed on your profile.
To change the legal name associated with your Pixlmob account (for Stripe payouts), follow the process found here.