You can rename your Gamepedia account, with help from the support team.
Please Note: Renaming your Gamepedia account will not affect the linked Twitch account and vice versa.
To request a rename of your Gamepedia account, please submit a ticket. In your ticket, please include your current username, desired username, and - if your current email does not match your account - the email address with which you made your account, for verification purposes.
If your account has been renamed to something like User-198876918, this is due to a GDPR requirement we had when we joined forces with Fandom in January 2019. To reclaim your username, follow these instructions.