OK, time for some silliness and fun.
One of the things that struck me about Revenge of the Sith was the apparently random way Palpatine chose to give Annakin his Sith name of Darth Vader. Discussing it with Emma (my girlfriend) we decide he must have had a copy of The Big Book of Sith Lord Names. We imagine the first page to go something like this:
Choosing a name for your Sith Apprentice is a very big decision. This is the name he will have for the rest of his life. It must convey his status as a Sith Lord effectively if he is to strike terror into the hearts of Jedi and lesser beings throughout the galaxy. Consider the terrible tale of Darth Fluffy who, despite being capable of the most commendable malice and able to bend the Force to his will virtually in his sleep, was driven to suicidal despair by the fact that his master had given him a name that meant no-one took him seriously.
Some examples of totally unsuitable names for a Sith Lord are given on the following pages.
So, can anyone think of some unsuitable names for a Sith Lord?