Robert Eugen Gaupp (3 October 1870 – 30 August 1953) was a German psychiatrist and neurologist who was a native of Neuenbürg, Württemberg.
Gaupp was an assistant to Carl Wernicke (1848–1905) and Karl Bonhoeffer (1868–1948) at Breslau, and afterwards worked with Emil Kraepelin (1856–1926) at the Universities of Heidelberg and Munich.
Gaupp performed numerous investigations of psychological disorders, and is remembered for his case studies of mass-murderer Ernst August Wagner (1874–1938).
Sometime shortly after the passage by decree, on 15 September 1935, of the "Nuremberg Laws"(officially "Laws for the Protection of German Blood and Honor"), Gaupp came to the support of a local physician, Albrecht Schroeder (pictured at left in image below), a collegiate fraternity brother in a non-fighting order, die Igel (the Hedgehogs), to which Gaupp also belonged.
With the passage of the Nuremberg Laws and the preemption of organizational authority to permit Jewish membership in non-dueling fraternal orders (Jews had never been permitted to join German dueling orders), Schroeder's status was made precarious because he was married to a Jew, née Felicia Rosenstein of Bad Cannstatt, an outer district of Stuttgart.