Theodor Koch-Grünberg (April 9th, 1872, Grünberg, Hesse, German Empire – October 8th, 1924, Caracaraí, Brazil) was a German ethnologist and explorer who made a valuable contribution to the study of the Indigenous peoples in South America, in particular the Pemon of Venezuela and other indigenous peoples in the Amazon region extending South-Western Brazil and a large part of the Vaupés region in Colombia.
The 2015 film El abrazo de la serpiente (Embrace of the Serpent) fictionalizes his illness and final days based on his journals.