This is the 9744th most frequent Russian word.
щеголев
The Russian word "щеголев" does not have an inherent standalone meaning in modern Russian; it may refer to a surname.
Here, 'Щеголев' is used as a proper noun—a surname identifying a specific individual.
Щеголев, будучи известным писателем, всегда привлекал внимание к своим произведениям.
Shchegolev, being a famous writer, always attracted attention to his works.
In this context, 'Щеголев' again serves as a surname, implying it identifies a specific individual encountered by the speaker.
На пути в Москву, я встретил Щеголева, старого друга моей семьи.
On the way to Moscow, I met Shchegolev, an old friend of my family.
Here, 'Щеголевым' is in instrumental case, denoting the person who wrote the mentioned chapter, indicating the surname belonging to the author.