Deux-Sèvres are a French department. Deux-Sèvres literally means "two Sèvres": the Sèvre Nantaise and the Sèvre Niortaise are two rivers which have their sources in the department.
Wikipedia https://en.wikipedia.org/wiki/Deux-Sèvres
Coordinates 46°19'26.808" N -0°27'53.785" E