Currently you can add Page Creator as a field in Confluence Databases, but this is less useful than Page Owner would be.

We're trying out Confluence Databases for our project planning, and the person who creates the page isn't always the project owner, or sometimes the project owner changes. Since it makes sense for the project owner to be the page owner anyway, it would save having to update multiple values in multiple places if we could display the Page Owner in a Database instead of the Page Creator.