From PathfinderWiki

Inperantike was the title of the ruler of the Jistka Imperium, equivalent to an emperor. The government of the Imperium was an imperialistic monarchy focused on expansion and technological advancement. Arustun was considered the first inperantike. Subsequent inperantikes were selected from among the most dignified Jistkan military officers or members of the faction of magistrates and the individual was ratified by the Honorat, the eldest and highest-ranking officials of the Imperium.1

Chronology of the Inperantikes of the Jistka Imperium

There follows an attempt at a chronological history of the inperantikes of the Jistka Imperium but, due to the lack of information from this ancient civilization, the order may not be fully correct and there are gaps in the sequence.2