A pun?

Maybe it's just an expression. I just made a connection. At the end of Chapter 5, our hero says he felt like a knight, "Ridder" in Dutch. Elsschot's real last name was, "de Ridder." I wonder if it's a pun or a coincidence, which happened as a result of the protagonist's use of a common expression. If it is a pun, I wonder if it was part of the original text or something added for this edition.