Need to change my name to book aws exam

The name cannot be changed from this forum site.
You probably have already contacted us through the URL below, but this is the only way to make changes.
https://support.aws.amazon.com/#/contacts/aws-training

As per https://aws.amazon.com/certification/policies/during-testing/#ID_Requirements

If you need your name changed in our system, please contact AWS Training and Certification support

They can be contacted at https://support.aws.amazon.com/#/contacts/aws-training

Good luck with your exam!