Maggie Smith would star in another movie named Quartet (2012) about 31 years later, however the only similarities between the two films are the title and Smith.
The book written by Jean Rhys was originally titled "Postures" when it was published in London in 1928 by Chatto and Windus. When the U.S. publishers Simon and Schuster published it in the United States, the name was changed to "Quartet".