Vettanic Social Structure

At the head of both the Jevaeran and Voslander kingdoms is the monarch, usually a king. The Vanarans have no king, and are instead split into numerous independent Jarldoms.
Beneath the monarch are the high nobility: Ealdormen in Vosland, and Earls in Jevaerland. The position of Earl is inheritable, while Ealdormen are appointed by the king, and their titles are not inheritable. In both cases, Earls and Ealdormen are often extremely powerful, sometimes rivalling the power of the monarch. The Vanaran equivalent is Jarl, though Jarls are almost always independent of any higher authority.
Below the high nobility are the low nobility: Thegns in Vosland, and Barons in Jevaerland. They are usually the holders of a single castle, though they sometimes hold several. In both cases, the titles are hereditary, and Voslander Ealdormen are usually appointed from among established Thegns.
Local magistrates are generally called Reeves in Vosland, and Bailiffs in Jevaerland. They rule over a set area of land in the name of their liege, and are usually appointed by them, but are in some cases elected by free peasants. Knights will often fill the role of a local magistrate, though in that case the position is likely to be hereditary.
Free commoners are called ceorls in Vosland, and churls in Jevaerland (pronounced the same). The term usually refers to peasant farmers who are not tied to specific land, but also applies to freemen living in towns and cities.
Tenants who are tied to the land are called villeins in Vosland, and serfs in Jevaerland. They have similar rights to freemen, except that they are not permitted to leave the land they work without permission from their liege.
Slavery is prohibited in Jevaerland, but in Vosland slaves are referred to as thralls. They have some legal protections, and thralldom is not passed on to children of thralls, but are otherwise effectively the property of their masters for a set period of time. This is commonly for 7 years, 14 years, or in some cases for life.
Haruist Thinkers exist somewhat outside of the standard social structure, but can usually be compared to the lowest ranks of nobility.