- Wagner, Richard, 1813-1883 (6)
- Ellis, William Ashton, d. 1919 (2)
- Hueffer, Francis, 1843-1889 (2)
- Liszt, Franz, 1811-1886 (2)
- Deathridge, John (1)
- Dieckmann, Friedrich (1)
- Förster-Nietzsche, Elisabeth, 1846-1935 (1)
- Geck, Martin (1)
- Kerr, Caroline V. (1)
- Mencken, H. L. (Henry Louis), 1880-1956 (1)
- Müller, Ulrich, 1940- (1)
- Nietzsche, Friedrich Wilhelm, 1844-1900 (1)
- Voss, Egon (1)
- Wapnewski, Peter (1)