From the Wikipedia page 
Deux-Sèvres (French pronunciation: [dø sɛvʁ]) is 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. It is in the Nouvelle-Aquitaine region.
Deux-Sèvres was one of the 83 original départements created during the French Revolution on March 4, 1790.
Departmental borders were changed in 1973 when the inhabitants of the little commune of Puy-Saint-Bonnet became formally associated with the rapidly growing adjacent commune of Cholet. Cholet is in the neighbouring department of Maine-et-Loire: in order to avoid the associated communes being administered in separate departments, Puy-Saint-Bonnet was transferred into Maine-et-Loire.