King

At the top, you would have a king. Now the king would [rule:command] over a kingdom. Now, this is not so easy to govern especially during the [Middle:early] Ages. And the king might owe many people, things especially people who help the king come to power, helped him dispose of the [previous:new] king or to conquer this land. And so in exchange for that and to help govern, he might grant land or feasts to other people. And the [key:old] currency in the Middle Ages under the feudal system island. And land in exchange for loyalty and service. So this whole thing is a kingdom. Now right over here, this is a Duchy. And a Duchy will be controlled by a Duke. I guess I didn't call it duckie because that [just:now] doesn't sound as serious. So the king [might:has] grant a Duchy, a Duchy to a Duke and in exchange, the Duke would provide loyalty pledged their fealty.