Gisela Bleibtreu-Ehrenberg (born August 2, 1929), M. A., PhD, is a German sociologist, ethnologist, sexologist, and writer further specializing into the fields of psychology, Indo-European studies, religious studies, and philosophy, since 1980 also increasingly anthropology. As Bleibtreu-Ehrenberg uses these approaches in research particularly in the fields of sexology, homophobia, and prejudice studies, the US Society of Lesbian and Gay Anthropologists (SOLGA; formerly Anthropology Research Group on Homosexuality, ARGOH) of the American Anthropological Association ranked Bleibtreu-Ehrenberg's works on homophobia as internationally outstanding.
Bleibtreu-Ehrenberg studied sociology, psychology, ethnology, religious studies, philosophy and Indogermanistik (an interdisciplinarian German subject, not identical with purely linguistic Indo-European studies in Anglophone countries, consisting of historical, sociological, cultural, religious, ethnological, philological, and linguistic study relating to Proto-Indo-European and Indo-European peoples and Indo-European languages) in Bonn.
In 1969, Bleibtreu-Ehrenberg graduated at the University of Bonn, receiving her Magister artium (comparable to a Master's degree in the Anglo-American educational system) for her thesis Homosexualität und Transvestition im Schamanismus ("Homosexuality and transvestition in shamanism"). In 1970, she received her PhD for her doctoral dissertation on Sexuelle Abartigkeit im Urteil der abendländischen Religions-, Geistes-, und Rechtsgeschichte im Zusammenhang mit der Gesellschaftsentwicklung ("The religious, philosophical, and legal construction of sexual deviance in interdependence with the development of Western society").