The taxon authority Geoffroy Saint-Hilaire may refer to:
- Albert Geoffroy Saint-Hilaire (1835–1919), French zoologist, son of Isidore Geoffroy Saint-Hilaire and grandson of Étienne Geoffroy Saint-Hilaire
- Étienne Geoffroy Saint-Hilaire (1772–1844), French naturalist
- Isidore Geoffroy Saint-Hilaire (1805–1861), French zoologist, who coined the term ethology
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