Change the real name of a child in my family

Hello Beta28,

Thank you for posting on the Xbox forums. As this question has been answered, we will be locking this thread. If you ever have another question or would like to start a discussion, don't hesitate to create a new thread.
We look forward to hearing more from you soon!

go to this link https://www.microsoft.com/en-us >
click on profile> my Microsoft account > click your info located at the top > right under the false name press
edit > verify it you and it should be good.

You need to access their Microsoft Account. Whether it be through the family account or his own MSA.

Please visit the following website for more information: https://account.microsoft.com/profile

So try this way, not by Xbox but accessing
Microsoft Family by browser. Just log in with your account, Select Manage my child's profile info. For the child’s account that you want to change, select Edit this child's personal info and then follow the instructions. See if now you will be able to change
his name.

Usually in Xbox you cannot change your name, even you with the main account, this stuff needs to be changed directly in the Manage Microsoft Account through the website.

Hi Evopwr! My name is Ricardo an independent advisor ready to help you with this situation!

Being the organizer of a Microsoft family doesn't change the child status of the account, the family organizer needs to be an adult account the child account must be added as a child account thst will allow the adult account to manage this settings