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I created my github.io page. Additionally, I added a www subdomain, it worked well.

Now I want to add another custom subdomain with this scheme: forename.rootdomain.com. For that reason, I added another CNAME to my rootdomain and point forename also to my surname.github.io page. This results in

404: There isn't a GitHub Pages site here.

Is it possible to add additional subdomains, besides blog. and www.? Additionally, is it possible without creating new repos with gh-pages branches?

I only want to maintain one GitHub page; not additional copies of it.

mkrieger1
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lkaupp
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  • Did you read [Managing a custom domain for your GitHub Pages site](https://help.github.com/en/github/working-with-github-pages/managing-a-custom-domain-for-your-github-pages-site#configuring-a-subdomain) and [Troubleshooting custom domains and GitHub Pages](https://help.github.com/en/github/working-with-github-pages/troubleshooting-custom-domains-and-github-pages#custom-domain-names-that-are-unsupported)? – mkrieger1 Mar 22 '20 at 20:38
  • Sure, but it's not clearly stated that other domains besides blog or www are possible or not. Sure you can directly add your subdomain as apex for your github page but I want multiple subdomains not only one. Well I solved it with Iframes and multiple repos but this solution is not preferable.. – lkaupp Mar 24 '20 at 06:58

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