From the Wikipedia page 
Kleve (Cleves in English use) or Kreis Kleve is a Kreis (local-government district) in northwestern North Rhine-Westphalia, Germany. Neighbouring districts are Borken, Wesel, and Viersen in Germany, and the Dutch provinces of Limburg and Gelderland.
The district in its present borders was created in 1975 when the former district of Kleve and Geldern was merged with the Rees District towns of Emmerich and Rees and the Moers District municipality of Rheurdt.
The two precursor districts had been created in 1816 when the whole of the Rhineland became a province of Prussia. Territorially they corresponded roughly to the historic duchies of Cleves and Guelders.