And depending on what you care about, this gets even more complicated. Some of the territories in the Carribean are part of the country of the Netherlands that you linked to (Bonaire, Sint Eustatius, Saba), while there are others that are separate countries part of the Kingdom of the Netherlands (Aruba, Curaçao, Sint Maarten). Some things are matters of the kingdom, while others are matters of the country.

For example, those other countries are not part of the European Union, but their citizens are citizens of the European Union since that's a matter of the Kingdom.