- Heidegger, Martin, 1889-1976 (4)
- Hegel, Georg Wilhelm Friedrich, 1770-1831 (2)
- Nietzsche, Friedrich Wilhelm, 1844-1900 (2)
- Blass, Friedrich, 1843-1907 (1)
- Bornmann, Fritz (1)
- Buchner, Hartmut, 1927- (1)
- Carpitella, Mario (1)
- Figl, Johann, 1945- (1)
- Gerth, Bernhard, 1844-1911 (1)
- Glau, Katherina (1)
- Harder, Richard, 1896-1957 (1)
- Kühner, Raphael, 1802-1878 (1)
- Michalski, Mark (1)
- Most, Glenn W. (1)
- Neumann, Günther (1)
- Nicolin, Friedhelm, 1926- (1)
- Plotinus, 205-270 (1)
- Porphyrios, ca. 234-ca. 305 (1)
- Pöggeler, Otto, 1928- (1)
- Schüler, Gisela (1)
- Schüssler, Ingeborg (1)
- Trawny, Peter, 1964- (1)