I started a blog at work and have other staff contributing. I noticed my display name was my login name. Not really what I wanted. I started by putting in my first and last name like the other contributor did, but it was still my login name as the post author.
The following link lead me to switching the author on the post.
The option to change author wasn’t present, so I went up top of the screen and selected “screen options”. “Author” was unchecked. Once checked I could see below where I could switch the author; however, it was still my login name. The next link got me my final answer.
In my actual profile I had to go down to “Display name”. In the dropdown I was able to select the name I wanted with the posts.
I hope this helps someone else out there…