Brzozowska Niewiarowska Julia
Julia Niewiarowska Brzozowska (* 1827- † December 10, 1891 Warsaw) pianist and composer of the Romantic period. In Warsaw, she studied piano and music theory with August Freyer. She has performed as a pianist, incl. in Poland and Germany. Together with her husband, a writer associated with Cyganeria Warszawska, Aleksander Niewiarowski, she ran a music salon. Author of piano pieces.
Information about the composer on the wikipedia.
Sheet music available at the National Library, also online (here)