Darth Murdrus

Darth Murdrus was a Sith Lord who lived between 9012 ABY and 37,980 ABY. He was one of Darth Annihilus's apprentices and was a lord of the New Sith Triumvirate. He was the master of Darth Genocidus and Darth Demonicus. These two apprentices were fiercely loyal to their master who never plotted to take control. When Murdrus was killed during the War of Destiny, Genocidus took control and continued the Triumvirate.

Behind the Scenes
Murdrus is of course derived from the word murder.