A complete name change on American

Yes, American allows name corrections for certain errors like misspellings. customer support 1 888 4.5.1 4.3.8.2 However, a complete name change (e.g., changing the passenger’s name) is generally not allowed.
Minor adjustments can be made, but you should contact American directly to inquire about the specific details and conditions.

https://techcommunity.microsoft.com/discussions/microsoftforms/a-complete-name-change-on-american/4316440

A complete name change on American