Original: The Union's name is formed from the beginning of each country's name; it was possibly created for the Benelux Customs Union, Revue de l'Institut International de Statistique (/O1947/O) Vol.
Simplified: The treaty establishing the Benelux Economic Union (Benelux Economische Unie\/Union Économique Benelux) was signed February 3, 1958 and came into force in 1960 to promote the free movement of workers, capital, services, and goods in the region.