Priscus
A Priscus (or Prisci in plural) is the informal leader of a clan within a Domain.
This position is generally not an official one in the Prince's governmental structure: a Priscus is not appointed by the Prince.
Rather the position arises organically within the political power structure of a given clan.
A certain elder gains power and prestige, gathers and bestows favors and has the power to enforce her edicts upon others of her clan.
Other clan members give her respect and fear her enough such that she becomes clan leader both de facto and, for all intents, at least within the clan, de jure.
