The north-western border of the commune is delineated by the Ruisseau de Longedeau stream flowing into the Ru des Barentons stream and continuing north changing its name a few times before joining the Souche river.
Souche |
One example are the forms ending with -acum, the name forms with a proprietary name, one example includes the name *Stirpius (derived from *Stirpiacum in which is the etymology of Étréchy) with the explication: The name of a person comes from stirps, souche in French; from E. Nègre (TGF § 6359).