Darth Plagueis's master has never been named or revealed.
Darth Plagueis' master was Darth Tenebrous. He was a male Bith Dark Lord of the Sith and played a significant role in training and shaping Plagueis into a powerful Sith Lord.
Darth Tenebrous
Darth Plagueis' master's name was the Sith Lord Darth Tenebrous.
Not much is known about Darth Plagueis. One thing I know is that Darth Plagueis's species was a Muun, but no one knows who his master was
It was widely assumed that Palpatine's master was Darth Plagueis.
Lord (Darth) Sidious
Muun Dark Lord of the Sith, Darth Plagueis the Wise.
He has no known master, but he is heir to the lineage of Darth Bane.
Darth Plagueis
Yes he did, as a matter of fact Plagueis was the master of Sideous. Unfortunately, Plagueis was the best Sith Lord around, and he told all he knew to Sideous. Then Sideous knew all about Plagueis and the past of the Jedi and Sith. Sideous, wanting to be the new Sith Lord, had killed Plagueis in his sleep, now leaving Sideous with all of the knowledge of Plagueis. So Plagueis was murdered by Sideous and that is how it had happened.
Khameir Sarin
Supreme Leader Snoke is Darth Plagueis
Darth Sidious is a Sith lord and the main villain in the Star Wars movies. A patient and manipulative person, Sidious, under the guise of Senator, and later Chancellor Palpatine orchestrated the transformation of the Galactic Republic into the Galactic Empire. He also played on Anakin Skywalker's fears in order to turn him to the Dark Side and dub him Darth Vader, whom he then order to help wipe out the Jedi. Sidious then established himself as emperor and ruled for some years until Vader killed him to save his son, Luke Skywalker.
Bane, Plagueis, Sidious, Maul, Tyranus, Vader