The person that owns the mansion of the star of the book is Mary Harriman Rumsey.
The studio that produced the movie was Sony Pictures Entertainment and Warner Bros.
Wikipedia has a lot of information about the book. The author of the book was F. Scott Fitzgerald, that has a cast of followers in a fictional town. This is a novel that a many people enjoy. Sparknotes the The Great Gatsby Study Guide is available. It has summaries and chapter summaries.