Delhi Sultanate. The "country" finally ended with the last of the Lodi dynasty.
So when a country knows only one dynasty and starts and ends with that dynasty, it does not make the dynasty the country. Making up a name for a country is easy; when these monarchs are called "king" it is a kingdom, when they are a "sultan", it is a sultanate.
If there is one drawback, it is that there might be a name for that country in the languages of the people who were linked to it. For this reason all the countries that I am about to create may be prime suspects for a merger.. The item, not the country :)