Ella Georgiyevna Adayevskaya was a Russian composer, pianist, and ethnomusicologist. Adayevskaya was a pseudonym; the composer derived it from the notes A, D, and A, played by the kettledrum in Mikhail Glinka's opera Ruslan and Ludmila. She was also known as Elisabeth (von) Schultz-Adaïewsky, as well as by the pseudonym Bertramin.
Adaïewsky wrote piano concertos, vocal music (including choral settings of the Russian Orthodox liturgy), and two operas. She also edited a collection of Italian dance songs and published her writings on folk music and the music of ancient Greece.