Page "Low Countries" Paragraph 21

In English, the plural form Netherlands is used for the present-day country, but in Dutch that plural has been dropped ; one can thus distinguish between the older, larger Netherlands and the current country.

So Nederland ( singular ) is used for the modern nation and de Nederlanden ( plural ) for the domains of Charles V. However, in official use the name of the Dutch kingdom is still Kingdom of the Netherlands ( Koninkrijk der Nederlanden ); the plural has not been dropped.

The name Kingdom of the Netherlands also refers to the united kingdom of 1815-1830 / 39, which included present-day Belgium.