It's possible that:
* The name is misspelled. Try checking for variations of the name or alternative spellings.
* The author is relatively unknown. Many authors publish works that may not have gained widespread recognition.
* The author writes under a different name. It's possible the author uses a pseudonym.
To help me find more information, could you provide:
* More context: Where did you encounter the name "Beryl Williams"?
* Specific details: Do you have any information about the type of writing, publication dates, or other related details?
With more information, I can assist you better in finding information about this author.