Your username is set as the blog author by default. You can either change it or hide the author's name completely:
Changing the blog post author
1. Within the editor, expand the blog management panel on the left and find a post that you want to edit. Click on the ellipsis button ⋮ near the blog post title:
2. Click Settings:
3. In the General tab, insert the name(s) under Post authors:
4. Save the changes and update your website for the changes to reflect online.
Hiding the author of a particular blog post
1. Within the editor, expand the blog management panel on the left and click on the blog post in question to open it:
2. Open the post header settings:
3. In the Style tab, hide the author by clicking on the eye icon:
4. Update your website for the changes to reflect online.
Hiding the author for all blog posts at once
1. Find the blog section on your website, click on it, and open its settings:
2. In the Style tab, hide the author by clicking on the eye icon:
3. Update your website for the changes to reflect online.