Ethel Newcomb (1875-1959)
She was a well-know concert pianist in Europe and the U.S. She studied with Theodor Leschetizky, and wrote a memoir of him, published in 1921, Leschetizky as I Knew Him.
From her obituary in the New York Times:
She made her debut in 1903 with the Vienna Philharmonic Orchestra. The next year, she played in London with the Queens Hall Orchestra at a concert conducted by Richard Strauss. She became known in Germany and the United States as a soloist and in ensemble, especially in Beethoven programs. Before World War I she returned from Europe and established her studio in the U.S. Students came to her from all over the world.