english: Étienne Geoffroy Saint-Hilaire (15 April 1772 – 19 June 1844) was a French naturalist who established the principle of "unity of composition".
non_english: Étienne Geoffroy Saint-Hilaire (15 April 1772 - 19 Juni 1844) inggih punika panyelidik alam Prancis ingkang nepangaken prinsip "kesatuan komposisi".