No, mythical Sith Lord from the previous Campaign of Ush's RPGs. Kuylen and his lackies (Takuan, Rah, and I are all that remain of them...) thought we could raid his tomb on a distant world (with a population of one billion Force-using frogs) for Sith secrets, but a Jedi had rid the world of Sith stuff 800 years before we attempted taking over.
I wrote this...
http://www.killermovies.com/forums/f7/t292165.html
last year, Melkor, to help acclimatise people to the style and rules (though some of those rules are obsolete).
It talks a little of the game's backstory; other than that to get the details of Demnos you would have to read through the plot of the previous campaign...
... which you can!