The official documents at that time were in French, in which it was labeled as 'Gouvernement Général de la Belgique' or in German as 'Generalgouvernement von Belgien'.

[1] In January 1814, by order of the Sixth coalition, represented by the Central Commission for the Administration of the Lands Recaptured from France, under the leadership of Baron vom Stein, several General Governments (Gouvernement Général) were established in the recaptured or liberated territories.

[3] The London Protocol of June 21, 1814 invited Prince William to accept the position of Governor-General of Belgium and to prepare for the unification of the Netherlands.

Willem accepted this on July 21 and announced on August 1 that he was taking over the government of Belgium.

This created a personal union of the Northern and Southern Netherlands under the leadership of a Sovereign Prince.