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Isidore Geoffroy Saint-Hilaire died on 1861-11-10.
Isidore Geoffroy Saint-Hilaire was born on 1805-12-16.
Étienne Geoffroy Saint-Hilaire was born on April 15, 1772.
Étienne Geoffroy Saint-Hilaire died on June 19, 1844 at the age of 72.