Replying...
Intro. Peter was a fake name I believe the Duffers created for him, since they couldn't really refer to him as either Vecna, 001 or Henry Creel without pretty majorly spoiling a part of Season 4. Henry Creel, also known as Vecna, One, and Mr. Whatsit, is a fictional character and one of the main antagonists of the Netflix science fiction horror television series Stranger Things. He is portrayed by Jamie Campbell Bower.

Peter Ballard aka 001

@TARDISGirl1985