It costs 2.50 to check the names of the owners of these companies at the chamber of commerce if that makes you doubt whether or not it's actually the name. This means that the owners were effectively outed by the publication anyway.
* Ultimate Beneficial Owner
Not mentioning lastnames is only a convention by journalists and the media. Publishing lastnames in the media is not a violation of the law. News website geenstijl.nl regularly publishes full names of suspects or criminals.
The convention already existed before the internet.
Update: I should have read more comments...