It is possible that:
* The name is misspelled: You may have misremembered the name or made a typo. Please double-check the spelling.
* The author uses a pen name: Clementine von Rothschild could be a pen name for a different author.
* The author is not widely known: The author might be a lesser-known writer or one who has not yet published widely.
To help me find the correct author, could you please provide more information, such as:
* The genre of the book: Is it fiction, non-fiction, poetry, etc.?
* The title of the book: If you know the title, that would be very helpful.
* Any other details: Do you remember anything else about the author or the book, such as the year of publication or any other relevant information?