Hmm I also have come up with many ideas for Sith names. Just to name a few:
Darth Phobius (obviously my Sith name; master of utilizing the fear of my enemies against them)
Darth Nekron (master of necromancy)
Darth Krullus (no specific meaning, but the name of my ToR empire character, Krullus)
Darth Insatia (a female Sith Lord name)
Darth Dementus (a mad warrior name, good for a powerful marauder)
And finally Darth Porkins (he was...rebuilt)
He came from...BEHIND!