Sonya (Соня) is the Russian diminutive of Sofia — from the Greek sophia, meaning "wisdom." Sonya Tolstaya (1844-1919) was Leo Tolstoy's wife and editor; Sonya in Crime and Punishment is a central figure.
Sonya peaked at #487 in the U.S. in 2001. The British actress Sonya Cassidy is a contemporary bearer.
Sonya reduces to seven — the number of Russian wisdom.