He analysed, among others, the psychoanalysts Otto Gross and A. S. Neill, as well as Freud's first biographer, Fritz Wittels.
Fritz Lang | Fritz Leiber | Fritz Kreisler | Fritz Weaver | Fritz Reiner | Fritz Haber | Robert Fritz | Robert C. Fritz | Fritz Gesztesy | Fritz Dreisbach | Chris Fritz | L'amico Fritz | Fritz London | Fritz Laves | Fritz Kranefuss | Fritz Grünbaum | Dennis Fritz | Fritz von Opel | Fritz | Fritz Wunderlich | Fritz Walter | Fritz Vahrenholt | Fritz Todt | Fritz Thyssen | Fritz the Cat (film) | Fritz Stern | Fritz Reuter | Fritz Odemar | Fritz Lenz | Fritz Kraemer |