Sofya Alexandrovna "Sonya" is a character in Leo Tolstoy's 1869 novel War and Peace, and in Sergey Prokofiev's 1955 opera War and Peace and Dave Malloy's 2012 musical Natasha, Pierre & the Great Comet of 1812 based on it. She is the orphaned niece of Count and Countess Rostov. Although sometimes called Sonya Rostova, it is not clear if that is her surname or not; the novel does not say. Alexandrovna is a patronymic.