William Wilson can refer to different individuals, past and present, as it is a relatively common name. Without specific context, it is not clear which William Wilson is in question. However, if you are asking about the author in relation to classic literature, you might be referring to the Scottish-born American teacher and writer of the 19th century who is less commonly known. He is not recognized as a widely famous author but might have local historical significance or academic influence.
If you were seeking information about a character rather than an author, "William Wilson" is also the title and protagonist of a short story by Edgar Allan Poe, which explores themes of doppelgängers and the duality of human nature. The character William Wilson in Poe's story is a man who encounters a mysterious double of himself with a similar name, leading to a tale of psychological depth and moral conflict.
If you could provide more context or clarify which William Wilson you are referring to, I would be able to give a more accurate description.