When did Baneite Sith naming conventions change?
Bane himself chose his name based on what Hurst referred to him as, abandoning his name of Dessell. Darth Zannah's birth name was Zannah, but she did abandon her nickname of Rain. When Bane recruited the Huntress, she chose to name herself Cognus.
However, when Plagueis recruited Palpatine, he chose the name Sidious for Palpatine. The same happened with Anakin being named Vader. When did it become the master naming the apprentice instead of the apprentice choosing their own name?