Noblility Ranks.
High King Erthad Glacier of the Glacier empire, Duke of Heleg Parath, Count of Maril Osto and Protector of the Othranar.
High Lords run an entire kingdom, know known as holds, these are under the complete control of the High Lords family. The Glacier empire is split into five holds, each one was once a kingdom and was united under the Glaciers.
Dukes run a section of a hold, known as their Dukedom. They usually have several towns and villages under their control. They can break their dukedoms into chunks of land, that lords run.
Counts run a city, they don't control land and often only control a small portion of the surronding land for the city, but they run the largest cities in the region, that aren't run by Dukes. This title is rather rare.