who was hailed by the ancient sith species as the sith'ari
The Jen'ari. Jen'ari was the title translated Dark Lord of the Sith in Basic. Jen'ari were the greatest and most powerful of the Sith Lords who took the place of the Sith'ari in Sith Hierarchy . There was only one Jen'ari at a time, who was the head of the Sith council and ruler of the Sith Empire.