Ernst Marcus may refer to:
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Ernst Marcus (zoologist)
Ernst Gustav Gotthelf Marcus (8 June 1893 – 30 June 1968) was a German zoologist, former occupant of the chair of zoology at the University of São Paulo from 1936 to 1963, and co-founder of the Oceanographic Institute of the University of São ...
(1893–1968), German zoologist
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Ernst Marcus (philosopher)
Ernst Moses Marcus (3 September 3, 1856, Kamen – 30 October, 1928 Essen) was a German lawyer and philosopher. He developed a theory of aether based on Immanuel Kant's posthumous work '' Opus Postumum'', however sharply disagreeing with Erich A ...
(1856–1928), German lawyer and philosopher
{{hndis, Marcus, Ernst