Some of the rulers and nobles mentioned actually lived and ruled in this time and in the country listed. Others that I mention are noted as the ruler of a country different from the one they actually ruled. Still others are merely names--possibly names of rulers from before or after this period. Names of spouses and children of rulers may be factual or made up.
Remember when all is said and done, this is JUST A STORY, not a history book. It was written to be entertaining, not necessarily enlightening.