Paxis

Paxis was the name of a Sith Lord in the Lost Tribe of the Sith. He was killed when he led an attack on the Jedi Temple in 43 ABY.

Raid on the Jedi Temple
When Paxis volunteered to raid the Jedi Temple, many informed him that it was likely to be a suicide attack. Despite this, Paxis insisted that he lead it personally. He killed a Jedi Knight on the threshold of the Temple, and then dueled Jedi Knight Jaden Korr. When all of Paxis's companions were killed, he attempted to run. It was then that Korr threw his lightsaber, impaling Paxis.

Behind the Scenes
Paxis is named after one of Jacen Solo's potential dark side names, Darth Paxis.