Indirik, the King of Leinster was a Petty King, on par with a Duke, and not the Royalty of England and more conventional nations.
Who cares? He was a King. Size of realm is irrelevant.
Or are you trying to say that size of the realm is important? In that case, the ruler of Terran is a petty king, on par with a duke. In fact, his entire realm is significantly smaller than my three-region duchy. In fact, I bet it's significantly smaller than most Dwilight duchies. It's existence as a realm is mostly just a paperwork thing.
