Aristocracy
There are different kinds of aristocracy with different ways the government is set up.  In history, most aristocracies are hereditary.  Members of the ruling group have passed on power to their eldest surviving Child. In most cases, this was their  son.  Daughters were often excluded from this. Aristocracy can be combined with other kinds of government. There were small groups of people that run a country. The people were called aristocrats and often had titles such as duke, duchess, baron and baroness.