Your question doesn't make sense at all. Starkiller is the name of Vader's apprentice, but that was what he was called. His actual name is Galen Marek.
It's simply Darth Starkiller
Darth Maul is a Zabrak from Idronia.
I do not know His first name but his sith name is Darth Tyranus. His first name was Dooku, but his last name is unknown.
Darth Vader, Darth Maul, The Emperor, Count Dooku, General Greivus.
darth vader
Darth Malgus was a human Sith lord during the Great Galactic War, he confronted 'Satele Shan' on Alderaan, Satele being Bastila Shan's decendant. He killed his Master 'Vindican' above Korriban when they attacked a Republic Station. Malgus was born on Dromund Kaas, it is believed that his original name was Veradun, although.. I personally have not come across anything to support that Belief.
Darth Plagueis' master's name was the Sith Lord Darth Tenebrous.
Galen Marek
I can't name them all because that is a hard question my young padawan... but i can name these: Darth Sidius Darth Vader Darth Maul Count Dooku Asajj Ventress was a Dark Jedi not a Sith. Ignore this answer. Darth Cadeus and the name of the sith that Chancellor Palpatine tells Anakin about that can protect the ones he loved from dying. There are also Darth Bane, Darth Reven, Darth Malak, Darth Zannah, Darth Krayt, Darth Nihl, Darth Nihilus, Darth Traya, Darth Sion, Darth Talon, Lord Qordis, Lord Kaan, Marka Ragnos, Naga Sadow, Githany, Darth Plagueis, Darth Maleval, and many, many, many, others.
Darth Sidious
Darth Zannah trained several apprentices for some period of time - Hetton, Set Harth and Darth Cognus. Hetton and Harth only studied under her very briefly, however, Cognus went on to succeed Zannah as a Lord of the Sith. Cognus spent most of her time in the Darth Bane trilogy as an Ikotchi assasin by the name of The Huntress.
Some websites say his real name is Jacob Nion, but his real name is actually Galen Marek.
Darth Vader isn't a Jedi Knight. His very name means that he is a Sith Lord not a Jedi Knight. From the second Anakin Skywalker is dubbed Darth Vader by Palpatine Anakin Skywalker ceased to exist and Darth Vader was born. That was also the second that Anakin was no longer a Jedi Knight, he was officially a Sith Lord. So your question is faulty.
The antagonists, who are pulled into the Dark Side of the Force, are: Darth Vader (Sith name of Anakin Skywalker) Palpatine (Senator, later Chancellor and Emperor aka Darth Sidious) Count Dooku (Jedi master who trained Yoda, aka Darth Tyranus) Darth Maul (Sith minion of Palpatine who kills Qui-Gon Jinn)
He didnt change it. Darth Sidious did when Anakin became a Sith. It is traditional for the Sith to bear the name "Darth."
Tatiana Stalker's birth name is Tatiana Regina de Souza.
Darth Vader's boyhood name was Ani.
Darth Maul is a Zabrak from Idronia.