United Duchies of Jülich-Cleves-Berg
On 30 April 1815, Prussian authorities reorganised the states of the kingdom into 10 provinces with the "" (), of which Jülich-Cleves-Berg was one. The province's name was a reference to the United Duchies of Jülich-Cleves-Berg, a former territory of the Holy Roman Empire which contained most of the land.