keeping it simple
John Wick is only called John Wick because Keanu Reeves kept forgetting the actual title
The 2014 action movie John Wick was originally supposed to be titled Scorn, but actor Keanu Reeves reportedly kept calling it "John Wick" on accident, forcing the studio to change the name. "The only reason it's called John Wick is that Keanu kept referring to it as John Wick," the movie's screenwriter, Derek Kolstad, told Comicbook.com. "Marketing was like, 'Dude, that's four to five million dollars in free advertising so far, so it's John Wick instead of Scorn.' I can't imagine it being Scorn now."
Reeves has actually done a lot to shape the John Wick series over the years, it turns out — he also reportedly insisted on riding a horse in John Wick: Chapter 3 — Parabellum "no matter what."