Yekaterina Alexeyevna Sinyavina (died 1784) was a Russian composer and pianist. A cembalo concerto by Giovanni Paisiello was probably first performed at the court of Catherine II in 1781 with Sinyavina as soloist. She served as a lady-in-waiting and composer at the court, married Count Simon Romanovich Vorontsov and died in St. Petersburg.
- Sadie, Julie Anne; Samuel, Rhian (1994). The Norton/Grove dictionary of women composers (Digitized online by GoogleBooks). Retrieved 22 November 2010.
- Ritzarev, Marina (2001). Eighteenth-century Russian music.
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