How to change Alias name on icloud account

I think that does not answer the question. Those steps toggle the alias address on or off or deletes it. How does one change the name associated with an alias? For example, I have my full name shown when I send email to trusted recipients using my primary address, but want to use a different name (eg. without the surname) when send an email to a new business using an alias address.

I see how to do that as follows from here: Add and manage email aliases for iCloud Mail on iCloud.com - Apple Support (NZ)

Change the full name or label

You can change the full name for an alias or a custom domain address. You can change the label for an alias.

1. In Mail on iCloud.com, click  at the top of the Mailboxes list, then choose Settings.
2. Click Account, then select an iCloud Mail alias in the list.
3. Edit the full name or label, then click Save Changes.

See this instructions on how to do that

You can turn an email alias on or off at any time. You can also delete email aliases that you no longer want to use. While turning off an email alias is temporary, deleting it is permanent. When an alias is turned off or deleted, email sent to that alias is returned to the sender.

1. In Mail on iCloud.com, click  at the top of the Mailboxes list, then choose Settings.
2. Click Accounts, select an iCloud Mail alias in the list, then do any of the following:

• • Turn off an alias: select “Disable alias”.
  • Turn on an alias: deselect “Disable alias”.
  • Delete an alias: click “Delete alias”, then click Delete.

1. Click Done.