Nigeria
Deriving for the most part from the pre-colonial states that existed in the region that would become known as Nigeria, the legally-recognised titles of the Nigerian nobility range from king to the ubiquitous chief. They give their bearers no political authority in theory, but in practice allow them to serve as immensely powerful patrons of the country's political leaders due to their control of popular opinion within its various tribes. Along with those of their titled relatives and courtiers, they also ensure that they serve as the guiding forces behind the varied cultural and religious ceremonies that take place in the country throughout the calendar year.
Titles such as Oba, Amanyanaboh, Mai, Obong, Sarki, Attah and Obi are used by the dynastic heads, while prince and princess are either used in their English forms or in their native ones by the cadets of their houses. Their ministers, meanwhile, tend to be called either chiefs or elders depending on what their monarchs are themselves called, with chiefs serving under a ruler who is called a king and elders serving under one called a chief.
Read more about this topic: Aristocracy (class)