According toponymy, Souzy means "underground river".
The name would Souzy origin Suciacus Soscius "designating the name of a Roman leader. The town was under the dominance, for part of the Earl of the castle Fenoyl Les Halles, and another part of the fief of the menu.
The hilltop village and grouped around its church which dominates the valley "Plain" offers a splendid panoramic view.