Basic Breakdown of Cynian Nobility

1. King/Queen: The ruler(s) of the entire kingdom. Theoretically absolute in power, they still have to work within the confines of what the Astralan Church will allow.
2. Duke/Duchess: Relatives of the monarchy. Do not own land, but may have private estates within a count's territory. Often hold positions of power within the government, though not always. The title primarily exists to keep track of the royal bloodline outside of the immediate ruling family and provide a slightly wider gene-pool for the royal family to pull from when time comes for marriage.
3. Count/Countess: The lord or lady in charge of a large portion of land, often including one major city and several smaller settlements. They set the taxes on those living on their lands and are in charge of training and outfitting knights. Most laws they make are enforced only within the city they preside over and must not directly go against the laws of the kingdom.
4. Baron/Baroness: Landlords assigned by a count to oversee parcels of rural land and collect taxes from the local peasantry. Typically in charge of only one or two smaller settlements, or one larger settlement, and the surrounding lands. They're required to gather armed militia to serve the count in times of battle, as well as oversee the production of crops and ensure their subjects are sufficiently equipped for the planting and harvest seasons. Barons usually have the option whether or not to bring their count's laws out to the rural peasantry, and usually choose to make their own as they see fit.

The inheriting child of a Count is a Viscount or Viscountess. The inheriting child of a Baron is a Baronet. All ruling and inheriting persons are referred to formally as [Title] [Last Name] of [Land].
All non-inheriting children are given titles appropriate to their job (knights would be Sir or Dame, those serving in the church would be titled according to their rank) or are simply called either Lord or Lady, followed by their first or full names. Noble children who have not yet reached the age of adulthood are not given titles and are instead referred to as Master or Mistress, followed by their first name. The exception is with royal children, who are always called Prince or Princess until either they or one of their siblings ascends the throne. Those who do not ascend the throne then become Duke or Duchess and their descendants will be in line for the throne if the current monarch fails to produce an heir. After two generations, Ducal children are brought into the pool of eligible candidates to become the next monarch's spouse.