Essonne (river) 1.95

The Essonne is a 97km long French river. It is a tributary off the left bank of the Seine. Its course crosses the departments of Loiret and Essonne, and it gives its name to the latter. The Essone's name and the present name of its higher course (the Œuf) originate in Acionna, a Gallo-Roman river goddess attested at Orléans (Genabum).GeographyIt begins on the Gâtinais plateau at La Neuville-sur-Essonne through the confluence of two rivers, the Œuf—whose source is near Chilleurs-aux-Bois, Loiret, at 130m above sea level—and the Rimarde—whose source is near Nibelle, Loiret, 182m. Notably it runs through Malesherbes and La Ferté-Alais, before running into the Seine at Corbeil-Essonnes.Notable among the Essonne's tributaries is the Juine, 55km long, which enters from the left. The other tributaries are short streams (the Velvette, the Ru de D’Huison, the Ru de Misery off the left bank; Ru de Boigny and the Ru de Ballancourt off the right bank).