What is Palpatine’s Sith name?

Palpatine’s Sith alias was the hidden identity he used as he rose from Naboo senator to Supreme Chancellor, secretly engineering the Clone Wars, corrupting Anakin, ordering the Jedi purge, and declaring the Galactic Empire. It’s revealed in Revenge of the Sith during his confrontation with Mace Windu. Don’t confuse this with Darth Plagueis, the Wise—Palpatine’s master obsessed with cheating death; Darth Tyranus—the Sith name of Count Dooku, leader of the Separatists; or Darth Maul—the Zabrak assassin from The Phantom Menace. The title itself plays on “insidious,” reflecting the Sith Rule of Two strategy: a master who hides in plain sight to rot the Republic from within.