S3存储桶/ AWS账户的所有者*名称*来自哪里？

This feels like it should be really obvious, but I can't find any clues. I've just started using S3 on AWS. I set up a new free account linked with my Amazon account. When I create a bucket, the name of the owner of the bucket is different from my IAM name, from my AWS account name, and from my Amazon account name. Where does that owner name come from? How can I change/edit it?This feels like it should be really obvious, bu