User blog comment:Zippertrain85/Dawnguard Follow up./@comment-17114085-20131216013719/@comment-9062114-20131223023300

My point is, nothing implies their were multiple kingdoms in Skyrim, meaning that Harkon probably was not a king of anything. If it was considered a part of Atmora, it was probably ruled by the King of Atmora.

I also like Ralok's theory.