Niederrhein, not Neiderrhein.
at the Moment there is a lot of action in the "Oberlandesgericht Köln" (a federal state court) going on between Düsseldorf-International and Niederrhein, which has tried to change ist name to 1. Airport Düsseldorf Prefecture Weeze and 2. Airport Düsseldorf Regional (Weeze).
Both namechanges were stopped by Düsseldorf-International with a court order, saying this irritates the customer, because Düsseldorf is 70 km away and therefore should not be allowed to use the word Düsseldorf in its name.