From Silver Sun Republic Codex

A Baronetcy is a land grant given to a Baronet in exchange for their service, purchased as part of a colonial charter or as part of the terms of vassalage for a foreign entity. Baronetcies generally consist of the feudal lord, their Great House and any vassals (mostly Contadini or Commoners) or free citizens (Popolani) who serve as House Artisans. Baronetcies are generally economically oriented while a Fiefdom is more geared towards military operations.