That'll never work. Say for instance there was a fan fiction community for The Last of Us; is this a gaming community, a TV show community, or a literature community? Really it's all of the above, so you have to use a more awkward name to fit into one category that doesn't even fully describe the community.

No, if you want to categorise communities like that it shouldn't be done through the name. You'll need to build a separate tag or label system instead, allowing communities to properly identify with multiple tags.