Can I change commit author, or delete everything and start over?

[RWE2]

I'm a novice, and I need to correct the author name in my initial commits.  I'm reading the excellent Bitbucket documentation, particularly the chapter on "undoing changes", but nothing seems to work: No matter what I try, the commits with the bad author name remain in my local file and also in the Bitbucket file.  If there is no way to fix this, can I just start over from scratch?

[Aron Gombas _Midori_]

I don't think you can easily change the author of an existing Git commit.

I will require a heavier operation and will lead to problems if you already published the commit. But if you can accept those, then here is a guide.