He is known as l'Aîné (the elder) to distinguish him from his younger brother, Hilaire Rouelle, who was also a chemist and known as the discoverer of urea.
Hilaire Belloc | Saint-Hilaire | Étienne Geoffroy Saint-Hilaire | Saint-Hilaire, Aude | Hilaire | Talmont-Saint-Hilaire | Saint-Hilaire, Isère | Isidore Geoffroy Saint-Hilaire | Saint-Hilaire-de-Riez | La Caillère-Saint-Hilaire | Jules Barthélemy-Saint-Hilaire | Hilaire Rouelle | Hilaire de Chardonnet | Geoffroy Saint-Hilaire (disambiguation) | Geoffroy Saint-Hilaire | Barbezieux-Saint-Hilaire |