Xendor

Xendor was a male Human general of the Legions of Lettow, a group of Force-sensitives who studied and wielded the dark side of the Force. A Kashi Mer Dynasty exile, he spoke out against the teachings of the Jedi and this philosophical disagreement eventually lead to open war with the Jedi Order. With his lover Arden Lyn at his side, he fought in the war of the First Great Schism and was eventually killed on the day of the Legions' defeat at Columus.

Lyn survived, but was placed in a deep trance following a confrontation with Jedi Grand Master Awdrysta Pina. As the New Sith Wars raged, rumors abounded of Xendor's return in the form of the enigmatic Dark Underlord. By the time of the Imperial Era, Xendor took on new life as a popular curse uttered by smugglers. During this time, Lyn was awoken from her preserving trance, and she made several attempts to resurrect Xendor. Emperor Palpatine killed Lyn in 10 ABY.

Text and facts from the “Xendor” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.